2021 Chevrolet Suburban Electrical Connector Parts: OEM & Replacement (175 Parts)

The 2021 Chevrolet Suburban has 175 electrical connector parts with verified fitment on this page — 52 part types and 12 brands, covering all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8). Each part includes a manufacturer part number and application notes.

On the 2021 Chevrolet Suburban, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. Most of the listed parts are Body Wiring Harness / Connector (22 parts), Chassis Wiring Harness / Connector (18 parts) and Engine Wiring Harness / Connector (16 parts). The other 49 part types cover the remaining 119 parts.

A/C Compressor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3702	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3702 Black Si Electrical Code: Q46A/C Compressor Solenoid Valve X12-Way Femalewith Leads1.5mm	View on Amazon

This table covers the harness connectors at the A/C Compressor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

ABS Wheel Speed Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85039843	🇺🇸 US 🇨🇦 CA	Connector Gender: Female Fitment notes — GM GENUINE 85039843 Connector Gender: Female Front RightWHEEL SENSOR ONLYMagneride Package (Z95)	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85090453	🇺🇸 US 🇨🇦 CA	Front RightPremium Smooth Ride Package (ZW7),Police Chassis Package (Z56) Fitment notes — GM GENUINE 85090453 Front RightPremium Smooth Ride Package (ZW7),Police Chassis Package (Z56)HARNESS AND WHEEL SPEED SENSOR ONLY	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85039841	🇺🇸 US 🇨🇦 CA	Fits Front LeftWheel Speed Sensor Only Fitment notes — GM GENUINE 85039841 Fits: Front LeftWheel Speed Sensor OnlyPolice Chassis Package (Z56)Labeled 85039841,84886787 or: Front LeftWheel Speed Sensor OnlyPremium Smooth Ride Package (ZW7)Labeled 85039841,84886787	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85039842	🇺🇸 US 🇨🇦 CA	Connector Gender: Female Fitment notes — GM GENUINE 85039842 Connector Gender: Female Front LeftWHEEL SENSOR ONLYMagneride Package (Z95)	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2346	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Complete AssemblyGray Fitment notes — STANDARD MOTOR PRODUCTS S2346 Complete AssemblyGray Front Right	View on Amazon

This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Accelerator Pedal Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S1478	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: Rectangle	View on Amazon

This table covers the harness connectors at the Accelerator Pedal Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Air Intake / Charge Temperature Sensor Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84727362	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84727362 GM Original Equipment Fits: CHARGE AIR COOLER INLET TEMPERATURE SENSORBLACK2-WAY FEMALEwith Leadsor CHARGE AIR COOLER OUTLET TEMPERATURE SENSORBLACK2-WAY FEMALEwith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85519071	🇺🇸 US 🇨🇦 CA	Black or Color: Natural Fitment notes — GM GENUINE 85519071 Black or Color: Natural Si Elec Code: B75CMultifunction Intake Air Sensor4-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2498	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Intake Air	View on Amazon

This table covers the harness connectors at the Air Intake / Charge Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Alternator / Generator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S1477	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	without Wiring Harness	View on Amazon

This table covers the harness connectors at the Alternator / Generator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Ambient Air Temperature Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2860	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 16 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2860 Connector Shape: OvalGauge: 16 GaugeHarness LengthInches: 13Terminal Type: Bladeblack	View on Amazon

This table covers the harness connectors at the Ambient Air Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Battery Current Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2860	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 16 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2860 Connector Shape: OvalGauge: 16 GaugeHarness LengthInches: 13Terminal Type: Bladeblack	View on Amazon

This table covers the harness connectors at the Battery Current Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Blower Motor Control Module / Resistor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S1353	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Length (In): 1 Fitment notes — STANDARD MOTOR PRODUCTS S1353 Length (In): 1 Frontwith 2 Terminal(s)	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2427	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Harness Length12.75 Fitment notes — STANDARD MOTOR PRODUCTS S2427 Harness Length12.75 Frontwith 4 Blade Terminals	View on Amazon

This table covers the connectors at the blower resistor or control module. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Body Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3702	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3702 Black Fits: RearLeftSide Impact SensorSi Elec Code: B63LR2-Way Femalewith Leads1.5mm or: RearRightSide Impact SensorSi Elec Code: B63RR2-Way Femalewith Leads1.5mm	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13577534	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 13577534 Black Fits: Si Elec Code: X50DFuse BlockBattery X112-Way Femalewith Leadsor Si Elec Code: X50BBattery Distribution Engine Compartment Fuse Block X112-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Si Elec Code: B20Brake Fluid Level Switch2-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84677313	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84677313 Black Si Elec Code: B233BRadar Sensor ModuleLong Range.75mm28-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84928314	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84928314 Black Fits: FrontRightSi Elec Code: E13RAHeadlamp8-Way Femalewith Leadsor Si Elec Code: X111Body Harness To Off-Road Grille Lamp Provisional Harness8-Way Femalewith Leadsor Si Elec Code: X421Body Harness To Police Strobe Light Provisional Harness8-Way Femalewith Leads or: LeftService Information Electrical Code: X110Body Harness to Headlamp Harness8-Way Femalewith Leads or: RightService Information Electrical Code: X120Body Harness to Headlamp Harness8-Way Femalewith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3743	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3743 GM Original Equipment SI Electric Code: T10FKEYLESS ENTRY ANTENNA - REAR WINDOWBLACK2-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84867146	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84867146 GM Original Equipment VIDEO DISPLAY ETHERNET JUMPER HARNESS TO BODY HARNESSBLACK2-WAY MALEwith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT220	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT220 Black Si Elec Code: X211Body Harness To Body Harness1-Way Malewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT242	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT242 Black Si Elec Code: X211Body Harness to Body Harness1-Way Femalewith LeadsUnsealed	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84999471	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84999471 Black Si Elec Code: P25Content Theft Deterrent Alarm Module3-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13576549	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 13576549 Black Fits: Si Electric Code: X401Body Harness to Rear Fascia Harness40-Way Femalewithout Leadsor Si Electric Code: X922Body Harness to Rear Fascia Harness40-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85005016	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 85005016 Black Windshield Washer PumpSi Elec Code: G242-Way Femalewith Leads2.5MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84941156	🇺🇸 US 🇨🇦 CA	Si Elec Code: K124BGray Fitment notes — GM GENUINE 84941156 Si Elec Code: K124BGrayActive Safety Control MODULE2 X34-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3776	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3776 Black Si Elec Code: B55Engine Hood Switch3-Way Femalewith Leads0.75MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2626	🇺🇸 US 🇨🇦 CA	SI ELEC CODE: P25CONTENT THEFT DETERRENT ALARM Fitment notes — GM GENUINE PT2626 SI ELEC CODE: P25CONTENT THEFT DETERRENT ALARM3-WAY FEMALE BLACK	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13593220	🇺🇸 US 🇨🇦 CA	Windshield Washer Fluid Level SwitchSi Elec Code: B118B Fitment notes — GM GENUINE 13593220 Windshield Washer Fluid Level SwitchSi Elec Code: B118BGray2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	86802964	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86802964 Black Si Elec Code: P12Horn2-Way Femalewith Leads1.5MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84773558	🇺🇸 US 🇨🇦 CA	Service Information Electric Code: B107Natural with Black Cover Fitment notes — GM GENUINE 84773558 Service Information Electric Code: B107Natural with Black CoverAccelerator Pedal Position Sensor6-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3779	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3779 Black Si Elec Code: S144AFolding Seat Control SwitchRear Compartment 2nd Row.75mm28-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3667	🇺🇸 US 🇨🇦 CA	Fits Si Elec Code: K182Parking Assist Control Module X2 Fitment notes — GM GENUINE PT3667 Fits: Si Elec Code: K182Parking Assist Control Module X2Gray.75mm8-Way Femalewith Leads or: LeftSi Elec Code: S174LGray.75mm8-Way Femalewith Leads3rd Row Seat Folding Switchor Si Elec Code: S144BGrayFolding Seat Control Switch3rd Row Rear Compartment.75mm8-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84683650	🇺🇸 US 🇨🇦 CA	Si Elec Code: B22Natural Fitment notes — GM GENUINE 84683650 Si Elec Code: B22NaturalBrake Pedal Position Sensor6-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19352907	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19352907 Black Fits: LeftSi Electrical Code: X308Body Harness to Second Row Seat Harness12-Way Femalewithout Leads or: LeftSi Electrical Code: X340Body Harness to Left Rear 2nd Row Seat Harness12-Way Femalewithout Leads	View on Amazon

This table covers the body-harness connectors and pigtails. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Brake Pad Wear Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2860	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 16 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2860 Connector Shape: OvalGauge: 16 GaugeHarness LengthInches: 13Terminal Type: Bladeblack	View on Amazon

This table covers the harness connectors at the Brake Pad Wear Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Brake Pedal Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2506	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Terminal Type: Blade Fitment notes — STANDARD MOTOR PRODUCTS S2506 Terminal Type: Blade Pedal Position Sensor Connector	View on Amazon

This table covers the harness connectors at the Brake Pedal. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Camshaft Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84766296	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84766296 Black Service Information Electrical Code: X154Engine Harness to Camshaft Position Sensor Jumper Harness8-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	86792094	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792094 Black Si Electrical Code: B23Camshaft Position Sensor3-Way Femalewith LeadsTerminal PN 1418850-3	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	86792095	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792095 Black Si Electrical Code: B23ECamshaft Position SensorExhaust3-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2807	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Camshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Chassis Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3940	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3940 GM Original Equipment Si Electric Code: B47Fuel Pressure SensorBlack3-Way Femalewith Leads1.0MM2	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2612	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2612 Black Service Information Electrical Code: Q13Evaporative Emission Vent Solenoid Valve2-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack Si Elec Code: B195CNitrogen Oxides Sensor 34-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3612	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE PT3612 BlackTerminal Gender: FemaleWidth: 6 in Service Information Electrical Code: X182Chassis Harness to Power Steering Harness6-Way Femalewith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84727362	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84727362 GM Original Equipment Fits: LeftBRAKE PAD WEAR SENSOR - FRONTBLACK2-WAY FEMALEwith Leadsor CHASSIS HARNESS TO FRONT DISC BRAKE PAD WEAR SENSOR JUMPER HARNESSBLACK2-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3773	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3773 GM Original Equipment Fits: LeftTail Lamp Assembly Harness to Chassis HarnessBlack6-Way Malewith Leads2.0mm or: LeftTail Lamp AssemblySi Electric Code: E42LBlack6-Way Malewith Leads2.0mm or: RightTail Lamp AssemblySi Electric Code: E42RBlack6-Way Malewith Leads2.0mm	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2677	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2677 Black Si Elec Code: B136Exhaust Particulate Matter Sensor4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3691	🇺🇸 US 🇨🇦 CA	Fits FrontLeft Fitment notes — GM GENUINE PT3691 Fits: FrontLeftWheel Speed SensorSi Elec Code: B5LFLT Gray2-Way Femalewith LeadsSealed, Key B2.0mm or: RearLeftWheel Speed SensorSi Elec Code: B5LRLT Gray2-Way Femalewith LeadsSealed, Key B2.0mm or: FrontRightWheel Speed SensorSi Elec Code: B5RFLT Gray2-Way Femalewith LeadsSealed, Key B2.0mm or: LeftSi Elec Code: X402LT GrayChassis Harness To Rear Wheel Speed Sensor Harness2-Way Femalewith LeadsSealed, Key B2.0mm or: RearRightWheel Speed SensorSi Elec Code: B5RRLT Gray2-Way Femalewith LeadsSealed, Key B2.0mm	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3912	🇺🇸 US 🇨🇦 CA	Si Elec Code: B150Natural Fitment notes — GM GENUINE PT3912 Si Elec Code: B150NaturalFuel Tank Pressure Sensor3-Way Femalewith Leads1.5mm	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT1402	🇺🇸 US 🇨🇦 CA	Si Elec Code: X406Chassis Harness to Chassis Rear Extension Harness Fitment notes — GM GENUINE PT1402 Si Elec Code: X406Chassis Harness to Chassis Rear Extension Harness4-Way Female Gray	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3693	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3693 Black RearRightWheel Speed SensorSi Elec Code: B5RR2-Way Femalewith LeadsSealed, Key C2.0mm	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3880	🇺🇸 US 🇨🇦 CA	Si Electrical Code: K4Gray Fitment notes — GM GENUINE PT3880 Si Electrical Code: K4GrayAssist Step Control Module X16-Way Femalewith Leads3mm	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84928314	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84928314 Black Si Electrical Code: K4Assist Step Control Module X28-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85533165	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 85533165 Black Fits: FrontLeftSi Elec Code: Q37LFShock Absorber Actuator2-Way Malewith Leads1.5 Wire or: RearLeftSi Elec Code: Q37LRShock Absorber Actuator2-Way Malewith Leads1.5 Wire or: RearRightSi Elec Code: Q37RRShock Absorber Actuator2-Way Malewith Leads1.5 Wire or: FrontRightSi Elec Code: Q37RFShock Absorber Actuator2-Way Malewith Leads1.5 Wire or: LeftSi Elec Code: X401Rear Shock Absorber Actuator Harness to Chassis Harness2-Way Malewith Leads1.5 Wir or: Si Elec Code: X407Fuel Door Jumper Harness to Chassis Harness2-Way Malewith Leads1.5 Wire	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3509	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3509 Black Fits: FrontLeftSuspension Position SensorSi Electrical Code: B152LF3-Way Femalewith Leads and CPA or: FrontRightSuspension Position SensorSi Electrical Code: B152RF3-Way Femalewith Leads and CPA or: FrontSuspension Height SensorService Information Electrical Code: B51F3-Way Femalewith Leads and CPA or: RearLeftSuspension Position SensorSi Electrical Code: B152LR3-Way Femalewith Leads and CPA or: RearRightSuspension Position SensorSi Electrical Code: B152RR3-Way Femalewith Leads and CPA or: RearSuspension Height SensorSi Electrical Code: B51R3-Way Femalewith Leads and CPA	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3592	🇺🇸 US 🇨🇦 CA	Si Elec Code: A7LT Gray Fitment notes — GM GENUINE PT3592 Si Elec Code: A7LT GrayFuel Pump and Level Sensor Assembly8-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	86816072	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86816072 Black Trailer Connector X1Si Elec Code: X887-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19352907	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19352907 Black Si Electrical Code: K4Assist Step Control Module X312-Way Femalewithout Leads	View on Amazon

This table covers the wiring-harness connectors at the Chassis. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Crankshaft Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Popular Fits: 5.3L V8, 3.0L L6 DIESEL Turbocharged	S2316	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalNumber of Splice Connectors Included: 3	View on Amazon
ACDELCO Fits: 5.3L V8	PT3940	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3940 GM Original Equipment Si Electric Code: B26Crankshaft Position SensorBlack3-Way Femalewith Leads1.0MM2	View on Amazon
DORMAN Fits: 5.3L V8	645325	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Black Fitment notes — DORMAN 645325 Black 3 Way Female with LeadsSi Electrical Code B26	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged	86792094	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792094 Black Si Elec Code: B26Crankshaft Position Sensor3-Way Femalewith LeadsTerminal PN 1418850-3	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	86792095	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792095 Black Si Elec Code: B26Crankshaft Position Sensor3-Way Femalewith Leads	View on Amazon
HOLSTEIN Fits: 5.3L V8	2HAR0060	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Crankshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Diesel Exhaust Fluid (DEF) Pump Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged	84808697	🇺🇸 US 🇨🇦 CA	GM Original Equipment	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged	86784917	🇺🇸 US 🇨🇦 CA	TANK HARNESS	View on Amazon

This table covers the wiring-harness connectors at the Diesel Exhaust Fluid (DEF) Pump. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Differential Pressure Sensor Connector

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	645325	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Black Fitment notes — DORMAN 645325 Black 3 Way Female with LeadsSi Electrical Code B154	View on Amazon

This table covers the harness connectors at the Differential Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

EGR Valve Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S2900	🇺🇸 US 🇨🇦 CA	Connector Shape: Rectangular, N/A	View on Amazon

This table covers the harness connectors at the EGR Valve. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Engine Block Heater Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84564686	🇺🇸 US 🇨🇦 CA	End 1 Terminal Gender: FemaleEnd 1 Terminal Type: Pin Fitment notes — GM GENUINE 84564686 End 1 Terminal Gender: FemaleEnd 1 Terminal Type: PinWiring Harness Engine Block Heater (K05)	View on Amazon

This table covers the harness connectors at the Engine Block Heater. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Engine Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged	PT2974	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2974 Black Starter Motor X1Si Elec Code: M641-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2971	🇺🇸 US 🇨🇦 CA	Gender: MaleTerminal Type: Blade Fitment notes — GM GENUINE PT2971 Gender: MaleTerminal Type: BladeBlack Si Elec Code: Q61Reductant Injector2-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Fits: Si Elec Code: B203Radiator Coolant Temperature Sensor2-Way Femalewith Leadsor Si Elec Code: B35Engine Oil Level Switch2-Way Femalewith Leadsor Si Elec Code: X158Engine Harness To Engine Oil Pressure Control Solenoid Valve Jumper Harness2-Way Femalewith Leadsor Service Information Electrical Code: Q12Evaporative Emission Purge Solenoid Valve2-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3612	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE PT3612 BlackTerminal Gender: FemaleWidth: 6 in Si Elec Code: X114Engine Harness To Active Grille Air Shutter Harness6-Way Femalewith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3743	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3743 GM Original Equipment Fits: LeftSI Electric Code: Q80LENGINE MOUNT SOLENOID VALVEBLACK2-WAY FEMALEwith Leads or: RightSI Electric Code: Q80RENGINE MOUNT SOLENOID VALVEBLACK2-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3940	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3940 GM Original Equipment DIESEL particulate filter Exhaust Differential Pressure SensorBlack3-Way Femalewith Leads1.0MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack Fits: Si Elec Code: B65Intake Manifold Pressure and Air Temperature Sensor4-Way Femalewith Leadsor Si Elec Code: B310Fuel Pressure/Temperature Sensor4-Way Femalewith Leadsor Si Elec Code: X153Engine Harness To Engine Coolant Temperature Jumper Harness4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3951	🇺🇸 US 🇨🇦 CA	Fits LeftSi Elec Code: G10L Fitment notes — GM GENUINE PT3951 Fits: LeftSi Elec Code: G10LEngine Cooling Fan Motor4-Way Femalewith Leads or: RightSi Elec Code: G10REngine Cooling Fan Motor4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3918	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3918 Black Fits: Si Elec Code: M106Exhaust Flow Control Valve Actuator.75MM25-Way Femalewith Leadsor Si Elec Code: Q14AExhaust Gas Recirculation Valve 1.75MM25-Way Femalewith Leadsor Si Elec Code: Q14BExhaust Gas Recirculation Valve 2.75MM25-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84928314	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84928314 Black Si Elec Code: X155Engine Harness To Active Fuel Management Solenoid Jumper Harness8-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3509	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3509 Black Transfer Case 2WD/4WD Actuator Position SensorSi Elec Code: B1393-Way Femalewith Leads and CPA	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84838880	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84838880 Black Service Information Electrical Code: X116Front Axle Harness To Engine Harness4-Way Malewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3534	🇺🇸 US 🇨🇦 CA	BlackShape: Oval Fitment notes — GM GENUINE PT3534 BlackShape: Oval Throttle BodySi Elec Code: Q386-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85786014	🇺🇸 US 🇨🇦 CA	Transmission Control ModuleSi Elec Code: K71 Fitment notes — GM GENUINE 85786014 Transmission Control ModuleSi Elec Code: K71Black with Black TPA66-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19352907	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19352907 Black Fits: SI ELEC CODE: X160ENGINE HARNESS TO BANK 1 FUEL RAIL HARNESS12-WAY FEMALEwithout LEADS or: SI ELEC CODE: X156ENGINE HARNESS TO ACTIVE FUEL MANAGEMENT SOLENOID JUMPER HARNESS12-WAY FEMALEwithout LEADS or: Si Electrical Code: X161Engine Harness to Bank 2 Fuel Rail Harness12-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3151	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3151 Black Fits: Si Elec Code: Q22Intake Manifold Tuning Solenoid Valve5-Way Femalewith Leadsor Turbocharger Vane Position ActuatorSi Electric Code: M1035-Way Femalewith Leads	View on Amazon

This table covers the wiring-harness connectors at the Engine. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Exhaust Gas Temperature (EGT) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2930	🇺🇸 US 🇨🇦 CA	Fits Si Elec Code: B130BHGray Fitment notes — GM GENUINE PT2930 Fits: Si Elec Code: B130BHGrayExhaust Gas Recirculation Temperature Sensor 2High Pressure2-Way Femalewith Leadsor Si Elec Code: B131AGrayExhaust Temperature Sensor 12-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2931	🇺🇸 US 🇨🇦 CA	Fits Si Elec Code: B131BGray Fitment notes — GM GENUINE PT2931 Fits: Si Elec Code: B131BGrayExhaust Temperature Sensor 22-Way Femalewith Leadsor Si Elec Code: B131CGrayExhaust Temperature Sensor 32-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3445	🇺🇸 US 🇨🇦 CA	Si Elec Code: B130AHGray Fitment notes — GM GENUINE PT3445 Si Elec Code: B130AHGrayExhaust Gas Recirculation Temperature Sensor 1High Pressure2-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S2492	🇺🇸 US 🇨🇦 CA	Fits Rearor with Right Connector	View on Amazon

This table covers the harness connectors at the Exhaust Gas Temperature (EGT) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Injection Pressure Regulator Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3982	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3982 Black Si Elec Code: Q18BFuel Pressure Regulator 22-Way Femalewith Leads	View on Amazon

This table covers the harness connectors at the Fuel Injection Pressure Regulator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Injector Connector

Brand	Part Number	Markets	Notes	Buy
GB REMANUFACTURING Fits: 5.3L V8	5191	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19333239	🇺🇸 US 🇨🇦 CA	SI ELEC CODE: X160ENGINE HARNESS TO FUEL INJECTOR HARNESS Fitment notes — GM GENUINE 19333239 SI ELEC CODE: X160ENGINE HARNESS TO FUEL INJECTOR HARNESSDK GRAY12-WAY FEMALEwithout LEADS	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	HP4347	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Handypack	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S1895	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Number of Splice Connectors Included: 2	View on Amazon

This table covers the harness connectors at the Fuel Injector. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Tank Pressure Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S1445	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Wiring Harness Length (In): 17Wiring Harness Length (mm): 431.8	View on Amazon

This table covers the harness connectors at the Fuel Tank Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Temperature Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2498	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Fuel Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Headliner Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3868	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3868 GM Original Equipment HEADLINER HARNESS TO MICROPHONE PROVISIONAL HARNESSBLACK.75MM24-WAY FEMALEwith Leads	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84769201	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84769201 Black Fits: Si Elec Code: E37BDome/Reading Lamps2nd Row8-Way Femalewith Leadsor Si Elec Code: E37CDome/Reading Lamps3rd Row8-Way Femalewith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84769202	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84769202 GM Original Equipment Fits: LeftSI Electric Code: E37HROOF RAIL REAR SEAT POSITION READING AND COURTESY LAMPBLACK4-WAY FEMALEwith Leads or: RightSI Electric Code: E37JROOF RAIL REAR SEAT POSITION READING AND COURTESY LAMPBLACK4-WAY FEMALEwith Leadsor OCCUPANT COMMUNICATION MICROPHONE - REARBLACK4-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3728	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3728 GM Original Equipment RAIN SENSOR JUMPER HARNESS TO HEADLINER HARNESSBLACK3-WAY MALEwith Leads0.75MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13529935	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE 13529935 BlackTerminal Gender: Female Si Electrical Code: B174WFront View CameraWindshield12-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13577390	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 13577390 Black Si Electrical Code: A10Inside Rear View Mirror X110-Way Femalewithout LeadsTerminated Leads 13575867	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19354840	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19354840 Black Fits: LeftSi Elec Code: E37SLDome/Reading Lamps2nd Row4-Way Femalewith Leads0.35mm or: RightSi Elec Code: E37SRDome/Reading Lamps2nd Row4-Way Femalewith Leads0.35mm	View on Amazon

This table covers the harness connectors at the Headliner. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

HVAC Control Switch / Panel Connector

Brand	Part Number	Markets	Notes	Buy
GPD Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	1713412	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with 3 Terminal(s)	View on Amazon

This table covers the harness connectors at the HVAC Control Switch / Panel. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Ignition Coil Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 5.3L V8	PT2368	🇺🇸 US 🇨🇦 CA	GoldShape: Rectangle Fitment notes — ACDELCO PT2368 GoldShape: Rectangle with Round Coil (S)	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3886	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3886 Black Fits: Si Elec Code: T8DIgnition Coil 44-Way Femalewith Leadsor Si Elec Code: T8AIgnition Coil 14-Way Femalewith Leadsor Si Elec Code: T8BIgnition Coil 24-Way Femalewith Leadsor Si Elec Code: T8CIgnition Coil 34-Way Femalewith Leadsor Si Elec Code: T8EIgnition Coil 54-Way Femalewith Leadsor Si Elec Code: T8FIgnition Coil 64-Way Femalewith Leadsor Si Elec Code: T8GIgnition Coil 74-Way Femalewith Leadsor Si Elec Code: T8HIgnition Coil 84-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 5.3L V8	HP4485	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	HandypackWiring Harness Length (mm): 304.8 Fitment notes — STANDARD MOTOR PRODUCTS HP4485 HandypackWiring Harness Length (mm): 304.8 with Round Coil(s)	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 5.3L V8	S761	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Wiring Harness Length (mm): 304.8 Fitment notes — STANDARD MOTOR PRODUCTS S761 Wiring Harness Length (mm): 304.8 with Round Coil(s)	View on Amazon

This table covers the harness connectors at the Ignition Coil. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Instrument Panel Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3695	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3695 Black Si Elec Code: M8Blower Motor6-Way Femalewith Leads5MM2/.75MM2	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2195	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2195 Black Steering Column Tilt and Telescope SwitchSi Elec Code: S717-Way Femalewith Leads	View on Amazon
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3743	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3743 GM Original Equipment SI Electric Code: T10JKEYLESS ENTRY ANTENNA - CENTER CONSOLE FRONTBLACK2-WAY FEMALEwith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84769201	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84769201 Black Fits: Si Elec Code: A22Radio Control X18-Way Femalewith Leadsor Si Elec Code: P17Display Module X18-Way Femalewith Leadsor Steering Column Lock ModuleSi Elec Code: K608-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84867143	🇺🇸 US 🇨🇦 CA	YellowTrailer Brake Control Switch Fitment notes — GM GENUINE 84867143 YellowTrailer Brake Control SwitchSi Elec Code: S76.75MM24-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2247	🇺🇸 US 🇨🇦 CA	Si Elec Code: X258Instrument Panel Harness to Instrument Panel Harness Fitment notes — GM GENUINE PT2247 Si Elec Code: X258Instrument Panel Harness to Instrument Panel HarnessGray8-Way Malewith Leads	View on Amazon

This table covers the harness connectors at the Instrument Panel. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Knock / Detonation Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19301207	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19301207 Black Fits: Si Elec Code: B68BKnock Sensor 22-Way Femalewith Leadsor Si Elec Code: B68AKnock Sensor 12-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S934	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Contact Terminal Material: Metal	View on Amazon

This table covers the harness connectors at the Knock / Detonation Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Manifold Pressure (MAP) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
BWD/NIEHOFF Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT944	🇺🇸 US 🇨🇦 CA	Evaporator Emission Control ConnectorAt Fuel Tank Pressure Sensor	View on Amazon
WELLS Fits: 5.3L V8	1P2218	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Manifold Pressure (MAP) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Mass Air Flow (MAF) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 5.3L V8	S2507	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Mass Air Flow (MAF) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

NOx (Nitrogen Oxide) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack Si Elec Code: B195ANitrogen Oxides Sensor 14-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85518225	🇺🇸 US 🇨🇦 CA	BlackGender: Male Fitment notes — GM GENUINE 85518225 BlackGender: MaleWire Gauge Measurement (GA.): 1.0 MM2 GA. Si Elec Code: B195ANitrogen Oxides Sensor 14-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S2894	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the harness connectors at the NOx (Nitrogen Oxide) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Oil Pressure Sender / Switch Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged	PT2980	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2980 Black Si Elec Code: B37BEngine Oil Pressure Sensor3-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 5.3L V8	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack Si Elec Code: B37BEngine Oil Pressure Sensor4-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S2882	🇺🇸 US 🇨🇦 CA	Connector Shape: RectangularHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S2882 Connector Shape: RectangularHarness Lengthinches: 12.25	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 5.3L V8	S2498	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Oil Pressure Sender / Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Oil Temperature Sender Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3921	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3921 Black Si Elec Code: B36Engine Oil Temperature Sensor.75mm23-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S2820	🇺🇸 US 🇨🇦 CA	with 3 Blade Terminals	View on Amazon

This table covers the harness connectors at the Oil Temperature Sender. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Oxygen (O2) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3353	🇺🇸 US 🇨🇦 CA	Fits Si Elec Code: B52FHeated Oxygen Sensor Fitment notes — GM GENUINE PT3353 Fits: Si Elec Code: B52FHeated Oxygen SensorBank 2 Sensor 2Gray4-Way Femalewith Leadsor Si Elec Code: B52DHeated Oxygen SensorBank 1 Sensor 2Gray4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85877333	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 85877333 Black Fits: Si Elec Code: B52CHeated Oxygen SensorBank 1 Sensor 1or Si Elec Code: B52EHeated Oxygen SensorBank 2 Sensor 1	View on Amazon

This table covers the harness connectors at the Oxygen (O2) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Park Assist (PAS) Camera Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84848437	🇺🇸 US 🇨🇦 CA	Rearwith Light Sensitive Inside Rear View Mirror with Full Video Display (DRZ), High Definition Digital Rear View Vision (UVB), Mono HD Digital Vision with 360 View (UV2), 360 View, Mono, Enhanced HD Digital Vision (UXP)	View on Amazon

This table covers the harness connectors at the Park Assist (PAS) Camera. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Parking Brake Actuator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 5.3L V8	S1414	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: RectangleTerminal Type: Blade Fitment notes — STANDARD MOTOR PRODUCTS S1414 Connector Shape: RectangleTerminal Type: BladeWiring Harness Length (mm): 476.25	View on Amazon

This table covers the harness connectors at the Parking Brake Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Power Seat Motor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3720	🇺🇸 US 🇨🇦 CA	Inboard Airbag ConnectorGray with Yellow Cover Fitment notes — GM GENUINE PT3720 Inboard Airbag ConnectorGray with Yellow CoverDriver and Passenger Front Seat and Roof Side Inflatable Restraint (AYQ)2-Way Femalewith Leads	View on Amazon

This table covers the harness connectors at the Power Seat Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Power Steering Assist Motor / Module Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84564097	🇺🇸 US 🇨🇦 CA	Connector Gender: Male, FemaleTerminal Type: Pin Fitment notes — GM GENUINE 84564097 Connector Gender: Male, FemaleTerminal Type: PinWire Quantity: 1	View on Amazon

This table covers the harness connectors at the Power Steering Assist Motor / Module. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Radiator Fan Motor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S949	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Radiator Fan Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Radio Connector

Brand	Part Number	Markets	Notes	Buy
METRA Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	AXBUCHGM2	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear View Camera Harness Fitment notes — METRA AXBUCHGM2 Rear View Camera Harness with NAV LS Model or LT Model or Premier or RST Model or Z71 Modelwith NAV	View on Amazon
METRA Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	AXBUCHGM3	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear View Camera Harness Fitment notes — METRA AXBUCHGM3 Rear View Camera Harness The Vehicle Must Be Running For The Factory Camera To Power On LS Model or LT Model or Premier or RST Model or Z71 ModelThe Vehicle Must be Running For The Factory Camera To Power On	View on Amazon

This table covers the harness connectors at the Radio. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Speaker Amplifier Connector

Brand	Part Number	Markets	Notes	Buy
METRA Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	AXABHGM1	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Amp Bypass Harness Fitment notes — METRA AXABHGM1 Amp Bypass Harness LS Model or LT Model or Premier or RST Model or Z71 Model	View on Amazon

This table covers the harness connectors at the Speaker Amplifier. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Steering Column Wiring Harness

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84426130	🇺🇸 US 🇨🇦 CA	Power Retractable Tilt Steering Column (N38)	View on Amazon

This table covers the Steering Column Wiring harnesses.

Temperature Sender / Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2930	🇺🇸 US 🇨🇦 CA	Si Elec Code: B34AGray Fitment notes — GM GENUINE PT2930 Si Elec Code: B34AGrayEngine Coolant Temperature Sensor 12-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Si Elec Code: B34JEngine Coolant Temperature Sensor 72-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged	S3154	🇺🇸 US 🇨🇦 CA	Located on Engine	View on Amazon

This table covers the harness connectors at the Temperature Sender / Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Throttle Control Actuator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	S2409	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Gender: MaleHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S2409 Gender: MaleHarness Lengthinches: 12.5	View on Amazon

This table covers the harness connectors at the Throttle Control Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Adapter Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	57101	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	7-Way Round RV To 4-Way Flat Adapter Fitment notes — CURT 57101 7-Way Round RV To 4-Way Flat Adapter with Back Up AlarmGM/Ford Plugwith Factory Tow Package	View on Amazon

This table covers the harness connectors at the Trailer Adapter. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Brake Switch Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	51525	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Brake Control Adapter Harness Fitment notes — CURT 51525 Brake Control Adapter Harness BlackIncludes OEM Connector2 Protective Sleeve12 GA. Wirewith Quick Plug	View on Amazon
TEKONSHA Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	3016	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	2-Plug Harness (Plugs Directly Into Your Vehicle and Brake Control)Brake Control Wiring Adapter Fitment notes — TEKONSHA 3016 2-Plug Harness (Plugs Directly Into Your Vehicle and Brake Control)Brake Control Wiring Adapter Drilling Required	View on Amazon

This table covers the harness connectors at the Trailer Brake Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Connector

Brand	Part Number	Markets	Notes	Buy
CURT Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	56415	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Replacement 7-Way RV Blade OEM SocketTwist-In Fitment notes — CURT 56415 Replacement 7-Way RV Blade OEM SocketTwist-In with Factory Tow Package	View on Amazon
CURT Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	55415	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Replacement 7-Way RV Blade OEM Socket Fitment notes — CURT 55415 Replacement 7-Way RV Blade OEM Socket with Factory Tow Package	View on Amazon
CURT Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	56229	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	7-Way USCAR Electrical ConnectorLength: 24 in. Fitment notes — CURT 56229 7-Way USCAR Electrical ConnectorLength: 24 in.Bonded Wire with Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	55515	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring ConnectorOE 4-Way Flat Fitment notes — CURT 55515 Custom Wiring ConnectorOE 4-Way FlatPlugs Into USCAR Replacement2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	56515	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Connector5-Way Flat Fitment notes — CURT 56515 Custom Wiring Connector5-Way Flat 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	55774	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way Fitment notes — CURT 55774 OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way with Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	57015	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	55384	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Connector4-Way Flat Fitment notes — CURT 55384 Custom Wiring Connector4-Way FlatRetains Use of 7 Way Round Connector 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	57020	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged Fitment notes — CURT 57020 OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged Factory TowPlugs Into USCAR	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	56584	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness5-Way Flat Fitment notes — CURT 56584 Custom Wiring Harness5-Way FlatRetains Use Of 7-Way OEM 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	58985	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
DORMAN Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	645170	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Black Fitment notes — DORMAN 645170 Black 7 Way Female with Leads	View on Amazon

This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Extension Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	56475	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness Extension Fitment notes — CURT 56475 Custom Wiring Harness Extension 20"Uscar To Uscarwith Factory Tow Package	View on Amazon

This table covers the harness connectors at the Trailer Extension. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Transfer Case Motor Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	PT3871	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3871 GM Original Equipment TRANSFER CASE MOTORSI Electric Code: A16BLACK8-WAY FEMALEwith Leads	View on Amazon

This table covers the harness connectors at the Transfer Case Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Transmission-Automatic Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	24055323	🇺🇸 US 🇨🇦 CA	End 1 Terminal Gender: Male Female Fitment notes — GM GENUINE 24055323 End 1 Terminal Gender: Male Female GEN2PASS-THRUETRS GEN2Pass-ThruEtrsExcept Identification-Not Equipped with Stop/Start System (NSS)	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	24045645	🇺🇸 US 🇨🇦 CA	GEN2MAIN/SOLENOID Fitment notes — GM GENUINE 24045645 GEN2MAIN/SOLENOIDETRS	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	24045647	🇺🇸 US 🇨🇦 CA	JUMPER, ETRS	View on Amazon

This table covers the wiring-harness connectors at the Transmission-Automatic. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Wire Terminal

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13582308	🇺🇸 US 🇨🇦 CA	Multi-PurposeWire Gauge Measurement: 1.00 GU Fitment notes — GM GENUINE 13582308 Multi-PurposeWire Gauge Measurement: 1.00 GUWiring Harness Length (In): 17.72 In	View on Amazon
GM GENUINE Popular Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	84757974	🇺🇸 US 🇨🇦 CA	Multi-PurposeColor: White Fitment notes — GM GENUINE 84757974 Multi-PurposeColor: WhiteTerminal Gender: FemaleWater Resistant: NoWire Gauge Measurement: 14 GUWire Length (In): 17.72 In	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	85528055	🇺🇸 US 🇨🇦 CA	Multi-PurposeColor: White Fitment notes — GM GENUINE 85528055 Multi-PurposeColor: WhiteGender: FemaleTerminal Type: PinWire Gauge Measurement: 15 GU	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19351723	🇺🇸 US 🇨🇦 CA	Multi-PurposeWire Gauge Measurement: 2.00 GU Fitment notes — GM GENUINE 19351723 Multi-PurposeWire Gauge Measurement: 2.00 GUWiring Harness Length (In): 17.72 In	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13576369	🇺🇸 US 🇨🇦 CA	Multi-PurposeWire Gauge Measurement: 0.50 GU Fitment notes — GM GENUINE 13576369 Multi-PurposeWire Gauge Measurement: 0.50 GU 0.5MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13576377	🇺🇸 US 🇨🇦 CA	Multi-PurposeWire Gauge Measurement: 6.00 GU Fitment notes — GM GENUINE 13576377 Multi-PurposeWire Gauge Measurement: 6.00 GU 3.0MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	13575850	🇺🇸 US 🇨🇦 CA	Multi-Purpose Fitment notes — GM GENUINE 13575850 Multi-Purpose Labeled 135758501.0MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19119395	🇺🇸 US 🇨🇦 CA	Multi-PurposeWire Gauge Measurement: 1.00 GU Fitment notes — GM GENUINE 19119395 Multi-PurposeWire Gauge Measurement: 1.00 GU 1.0MM2	View on Amazon
GM GENUINE Fits: 3.0L L6 DIESEL Turbocharged, 5.3L V8	19370262	🇺🇸 US 🇨🇦 CA	Multi-PurposeColor: White Fitment notes — GM GENUINE 19370262 Multi-PurposeColor: WhiteConductor Material: CopperTerminal Gender: FemaleWire Gauge Measurement: 22 GUWire Length (In): 17.72 In	View on Amazon

This table covers the terminals crimped onto a harness lead.

Buying Electrical Connector Parts for a 2021 Chevrolet Suburban

On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.

Match the engine first. Every electrical connector part here is engine-specific; each row shows which engine(s) it fits.
Read the notes on each row for position, trim and spec qualifiers before you order.
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Body Wiring Harness / Connector and Chassis Wiring Harness / Connector .

Frequently Asked Questions

How many electrical connector parts fit the 2021 Chevrolet Suburban?

Our catalog currently lists 175 electrical connector parts for the 2021 Chevrolet Suburban across 52 subcategories and 12 brands, covering all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8). Each part is matched to the engine(s) it fits.

Do electrical connector parts differ between 2021 Chevrolet Suburban engines?

Yes. Every electrical connector part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

What are the signs of electrical connector problems on a 2021 Chevrolet Suburban?

Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Chevrolet Suburban was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2021 Chevrolet Suburban?

First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Chevrolet Suburban

Belt Drive Body & Lamp Assembly Brake & Wheel Hub Cooling System Drivetrain Electrical Electrical Bulb & Socket Electrical Switch & Relay Engine Exhaust & Emission Fuel & Air Heat & Air Conditioning Ignition Interior Steering Suspension Automatic Transmission Wheel Wiper & Washer

Electrical Connector Parts for Other Chevrolet Suburban Years

2026 Chevrolet Suburban 2025 Chevrolet Suburban 2024 Chevrolet Suburban 2023 Chevrolet Suburban 2022 Chevrolet Suburban 2020 Chevrolet Suburban 2019 Chevrolet Suburban

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.

Published by AutoFactsDB from manufacturer application data. How fitment is matched Report a fitment error