2021 Cadillac XT6 Electrical Connector Parts: OEM & Replacement (128 Parts)

128 Electrical connector parts are listed for the 2021 Cadillac XT6, in 41 part types, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Each one has a brand, a manufacturer part number and notes that say where it fits.

On the 2021 Cadillac XT6, 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 (16 parts), Engine Wiring Harness / Connector (12 parts) and Trailer Connector (12 parts). The other 38 part types cover the remaining 88 parts.

A/C Compressor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: all 2021 XT6 engines	PT3702	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3702 Black Si Electrical Code: Q46A/C Compressor Solenoid Valve2-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
HOLSTEIN Fits: all 2021 XT6 engines	2HAR0035	🇺🇸 US 🇨🇦 CA	Includes ABS Wheel Speed Sensor Wire Harness Fitment notes — HOLSTEIN 2HAR0035 Includes ABS Wheel Speed Sensor Wire Harness Rearwithout Collision Warning System	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: all 2021 XT6 engines	S1478	🇺🇸 US 🇨🇦 CA	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
GM GENUINE Fits: 2.0L L4 Turbocharged	85518225	🇺🇸 US 🇨🇦 CA	BlackGender: Male Fitment notes — GM GENUINE 85518225 BlackGender: MaleWire Gauge Measurement (GA.): 1.0 MM2 GA. Si Elec Code: B75CMultifunction Intake Air Sensor4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.6L V6	84677313	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84677313 Black Si Elec Code: B75CMultifunction Intake Air Sensor.75mm28-Way Femalewith Leads	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
ACDELCO Fits: all 2021 XT6 engines	84941154	🇺🇸 US 🇨🇦 CA	Black Fitment notes — ACDELCO 84941154 Black Si Elec Code: G13Generator X12-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2971	🇺🇸 US 🇨🇦 CA	Gender: MaleTerminal Type: Blade Fitment notes — GM GENUINE PT2971 Gender: MaleTerminal Type: BladeBlack Si Elec Code: G13Generator X12-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	S1477	🇺🇸 US 🇨🇦 CA	without Wiring Harness	View on Amazon
WELLS Fits: all 2021 XT6 engines	1P3341	🇺🇸 US 🇨🇦 CA		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.

Body Control Module (BCM) Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 2.0L L4 Turbocharged	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Tier 3 Federal Emission System (NTB) or SULEV30 California Emissions (NUG)2-Way Femalewith Leads	View on Amazon

This table covers the harness connectors at the Body Control Module (BCM). 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: all 2021 XT6 engines	PT3702	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3702 Black Si Elec Code: T10EKeyless Entry AntennaRear Compartment2-Way Femalewith Leads1.5mm	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT3912	🇺🇸 US 🇨🇦 CA	Fits FrontLeft Fitment notes — GM GENUINE PT3912 Fits: FrontLeftVertical Suspension Acceleration SensorSi Electrical Code: B161LFNatural3-Way Femalewith Leads1.5mm or: FrontRightVertical Suspension Acceleration SensorSi Electrical Code: B161RFNatural3-Way Femalewith Leads1.5mm or: FrontSuspension Height SensorSi Electrical Code: B51FNatural3-Way Femalewith Leads1.5mm	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT3612	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE PT3612 BlackTerminal Gender: FemaleWidth: 6 in Fits: RearRightTurn Signal LampSi Elec Code: E4RR6-Way Femalewith Leads or: RearLeftTurn Signal LampSi Electrical Code: E4LR6-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	85533165	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 85533165 Black Fits: FrontLeftSi Elec Code: Q37LFShock Absorber Actuator2-Way Malewith Leads1.5 Wire or: RightSi Elec Code: X107Front Shock Harness to Body Harness2-Way Malewith Leads1.5 Wir or: Si Elec Code: X114Body Harness to Body Harness2-Way Malewith Leads1.5 Wire	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2792	🇺🇸 US 🇨🇦 CA	Fits RearLeft Fitment notes — GM GENUINE PT2792 Fits: RearLeftSide Impact SensorSi Elec Code: B63LRDK Gray2-Way Femalewith Leads or: RearRightSide Impact SensorSi Elec Code: B63RRDK Gray2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	84999471	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84999471 Black Si Elec Code: P25Power Sounder Content Theft Deterrent Alarm Module3-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	13576549	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 13576549 Black Si Electric Code: X103Body Harness to Forward Lamp Harness40-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	87815146	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 87815146 Black Fits: Terminating ResistorHigh Speed Extension Bus 2Si Elec Code: R6F2-Way Femalewith Leadsor Terminating ResistorHigh Speed BusSi Elec Code: R6A2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2626	🇺🇸 US 🇨🇦 CA	SI ELEC CODE: P25POWER SOUNDER CONTENT THEFT DETERRENT ALARM MODULE Fitment notes — GM GENUINE PT2626 SI ELEC CODE: P25POWER SOUNDER CONTENT THEFT DETERRENT ALARM MODULE3-WAY FEMALE BLACK	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3505	🇺🇸 US 🇨🇦 CA	BlackCrimping Tool Included: No Fitment notes — GM GENUINE PT3505 BlackCrimping Tool Included: NoShape: Square SpeakerSubwooferSi Elec Code: P19AC2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3865	🇺🇸 US 🇨🇦 CA	Si Electrical Code: X80CGray Fitment notes — GM GENUINE PT3865 Si Electrical Code: X80CGrayAccessory Power ReceptacleCargo4.0MM23-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3735	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3735 Black Si Elec Code: X20Memory Card Receptacle X1.75mm26-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3906	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3906 Black Fits: FrontLeftWheel Speed SensorSi Elec Code: B5LF2-Way Femalewith Leads or: FrontRightWheel Speed SensorSi Elec Code: B5RF2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	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: all 2021 XT6 engines	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 Leadsor Si Elec Code: S144BGrayFolding Seat Control Switch3rd Row Rear Compartment.75mm8-Way Femalewith Leads or: LeftSi Elec Code: S144BLGrayFolding Seat Control Switch3rd Row Side.75mm8-Way Femalewith Leads or: RightSi Elec Code: S144BRGrayFolding Seat Control Switch3rd Row Side.75mm8-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2888	🇺🇸 US 🇨🇦 CA	Windshield Wiper MotorSi Elec Code: M75 Fitment notes — GM GENUINE PT2888 Windshield Wiper MotorSi Elec Code: M75Gray5-Way Femalewith 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 Pedal Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	S2506	🇺🇸 US 🇨🇦 CA	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: all 2021 XT6 engines	86792094	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792094 Black Fits: Si Elec Code: B23ACamshaft Position SensorBank 1 Exhaust3-Way Femalewith LeadsTerminal PN 1418850-3or Si Elec Code: B23CCamshaft Position SensorBank 2 Exhaust3-Way Femalewith LeadsTerminal PN 1418850-3or Si Elec Code: B23DCamshaft Position SensorBank 2 Intake3-Way Femalewith LeadsTerminal PN 1418850-3or Si Electrical Code: B23ECamshaft Position SensorExhaust3-Way Femalewith LeadsTerminal PN 1418850-3or Si Electrical Code: B23FCamshaft Position SensorIntake3-Way Femalewith LeadsTerminal PN 1418850-3	View on Amazon
HOLSTEIN Fits: all 2021 XT6 engines	2HAR0060	🇺🇸 US 🇨🇦 CA		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged	S2807	🇺🇸 US 🇨🇦 CA		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.

Crankshaft Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 2.0L L4 Turbocharged	PT3921	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3921 Black Si Elec Code: B26Crankshaft Position Sensor.75mm23-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: 3.6L V6	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
HOLSTEIN Fits: 3.6L V6	2HAR0060	🇺🇸 US 🇨🇦 CA		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged	S2916	🇺🇸 US 🇨🇦 CA		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2316	🇺🇸 US 🇨🇦 CA	Connector Shape: OvalNumber of Splice Connectors Included: 3	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.

Differential Lock Sensor Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: all 2021 XT6 engines	84896487	🇺🇸 US 🇨🇦 CA	4WDMating Connector Use 19354741 Fitment notes — GM GENUINE 84896487 4WDMating Connector Use 19354741Except Electronic Twin Clutch Positraction Axle (G99) SportElectronic Twin Clutch Positraction Axle (G99)	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	84896488	🇺🇸 US 🇨🇦 CA	4WDExcept Electronic Twin Clutch Positraction Axle (G99)	View on Amazon

This table covers the harness connectors at the Differential Lock 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.

Engine Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: all 2021 XT6 engines	PT2971	🇺🇸 US 🇨🇦 CA	Gender: MaleTerminal Type: Blade Fitment notes — GM GENUINE PT2971 Gender: MaleTerminal Type: BladeBlack Starter Motor X1Si Elec Code: M642-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Fits: Si Elec Code: Q44Engine Oil Pressure Control Solenoid Valve2-Way Femalewith Leadsor Si Elec Code: B203Radiator Coolant Temperature Sensor2-Way Femalewith Leadsor Service Information Electrical Code: Q12Evaporative Emission Purge Solenoid Valve2-Way Femalewith Leads Fits: Si Elec Code: Q44Engine Oil Pressure Control Solenoid Valve2-Way Femalewith Leadsor Si Elec Code: B203Radiator Coolant Temperature Sensor2-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT3612	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE PT3612 BlackTerminal Gender: FemaleWidth: 6 in Si Electrical Code: X161Engine Harness to Bank 2 Fuel Rail Harness6-Way Femalewith Leads	View on Amazon
ACDELCO Fits: all 2021 XT6 engines	PT3743	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3743 GM Original Equipment TURBOCHARGER BYPASS SOLENOID VALVESI Electric Code: Q40BLACK2-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: all 2021 XT6 engines	84941154	🇺🇸 US 🇨🇦 CA	Black Fitment notes — ACDELCO 84941154 Black Starter Motor X1Si Elec Code: M642-Way Femalewith Leads	View on Amazon
ACDELCO Fits: all 2021 XT6 engines	84785110	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84785110 GM Original Equipment Fits: Si Electric Code: Q6ECamshaft Position Actuator Solenoid Valve - ExhaustBlack.75mm2-Way Femalewith Leadsor Si Electric Code: Q6FCamshaft Position Actuator Solenoid Valve - IntakeBlack.75mm2-Way Femalewith Leadsor Transmission Control Solenoid Valve 5Si Electric Code: Q77EBlack.75mm2-Way Femalewith Leadsor BLACKAUTOMATIC TRANSMISSION ACCUMULATOR SOLENOID VALVE.75MM22-WAY FEMALEwith Leads	View on Amazon
ACDELCO Fits: all 2021 XT6 engines	PT3698	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3698 GM Original Equipment Si Electric Code: G58Evaporative Emission Purge PumpBlack.75mm6-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3702	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3702 Black Fits: Si Elec Code: Q6ACamshaft Position Actuator Solenoid ValveBank 1 Exhaust2-Way Femalewith Leads1.5mmor Si Elec Code: Q6BCamshaft Position Actuator Solenoid ValveBank 1 Intake2-Way Femalewith Leads1.5mmor Si Elec Code: Q6CCamshaft Position Actuator Solenoid ValveBank 2 Exhaust2-Way Femalewith Leads1.5mmor Si Elec Code: Q6DCamshaft Position Actuator Solenoid ValveBank 2 Intake2-Way Femalewith Leads1.5mmor Si Electrical Code: Q84ACamshaft Position Actuator Park Lock Solenoid ValveBank 1 Intake2-Way Femalewith Leads1.5mmor Si Electrical Code: Q84BCamshaft Position Actuator Park Lock Solenoid ValveBank 2 Intake2-Way Femalewith Leads1.5mmor Valve Lifter Oil Solenoid ValveBank 1Si Electrical Code: Q83A2-Way Femalewith Leads1.5mmor Valve Lifter Oil Solenoid ValveBank 2Si Electrical Code: Q83B2-Way Femalewith Leads1.5mm	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack Service Information Electrical Code: X116Engine Harness To Engine Oil Level Sensor Harness4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	13577534	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 13577534 Black Si Elec Code: G18High Pressure Fuel Pump2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3534	🇺🇸 US 🇨🇦 CA	BlackShape: Oval Fitment notes — GM GENUINE PT3534 BlackShape: Oval Fits: Throttle BodySi Elec Code: Q386-Way Femalewith Leadsor Turbocharger Wastegate ActuatorSi Elec Code: M1286-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	19352907	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 19352907 Black SI ELEC CODE: X160ENGINE HARNESS TO BANK 1 FUEL RAIL HARNESS12-WAY FEMALEwithout 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.

Fuel Injector Connector

Brand	Part Number	Markets	Notes	Buy
GB REMANUFACTURING Fits: 3.6L V6	5191	🇺🇸 US 🇨🇦 CA		View on Amazon
SKP Fits: all 2021 XT6 engines	SKS824	🇺🇸 US 🇨🇦 CA	Includes ABS Wheel Speed Sensor Wire Harness	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	HP4347	🇺🇸 US 🇨🇦 CA	Handypack	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	S1895	🇺🇸 US 🇨🇦 CA	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 Sending Unit Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S3309	🇺🇸 US	FWD	View on Amazon

This table covers the harness connectors at the Fuel Sending Unit. 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: all 2021 XT6 engines	S1445	🇺🇸 US 🇨🇦 CA	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.

Headlamp Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Popular Fits: all 2021 XT6 engines	PT3940	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3940 GM Original Equipment Turbocharger Boost SensorBlack3-Way Femalewith Leads1.0MM2	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT3612	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Female Fitment notes — GM GENUINE PT3612 BlackTerminal Gender: FemaleWidth: 6 in Fits: LeftSi Elec Code: X110Forward Lamp Harness to Headlamp Harness6-Way Femalewith Leads or: RightSi Elec Code: X120Forward Lamp Harness to Headlamp HarnessExcept Glarefree Highbeam, Automatic Dynamic Control Headlamps (UVG)Auto Headlamp Leveling System (TR7)6-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2792	🇺🇸 US 🇨🇦 CA	Fits LeftSi Elec Code: B59L Fitment notes — GM GENUINE PT2792 Fits: LeftSi Elec Code: B59LFront Impact SensorDK Gray2-Way Femalewith Leads or: RightSi Elec Code: B59RFront Impact SensorDK Gray2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	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: all 2021 XT6 engines	85519071	🇺🇸 US 🇨🇦 CA	Black or Color: Natural Fitment notes — GM GENUINE 85519071 Black or Color: Natural Fits: Si Elec Code: M96BActive Grille Air Shutter 2 Actuator4-Way Femalewith Leadsor Si Elec Code: M96AActive Grille Air Shutter 1 Actuator4-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	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: all 2021 XT6 engines	PT3505	🇺🇸 US 🇨🇦 CA	BlackCrimping Tool Included: No Fitment notes — GM GENUINE PT3505 BlackCrimping Tool Included: NoShape: Square RightSi Elec Code: P12RHorn2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	13593220	🇺🇸 US 🇨🇦 CA	Windshield Washer Fluid Level SensorSi Elec Code: B118 Fitment notes — GM GENUINE 13593220 Windshield Washer Fluid Level SensorSi Elec Code: B118Gray2-Way Femalewith Leads	View on Amazon

This table covers the wiring-harness connectors at the Headlamp. 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.

Headliner Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Popular Fits: all 2021 XT6 engines	PT3868	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3868 GM Original Equipment Si Electric Code: S25Garage Door OpenerBlack.75mm4-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	PT2726	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2726 Black Fits: LeftSunshadeSi Elec Code: A3L2-Way Malewith LeadsSquare or: RightSunshadeSi Elec Code: A3R2-Way Malewith LeadsSquare or: FrontLeftService Information Electric Code: B24LFMobile Telephone Microphone2-Way Malewith LeadsSquare	View on Amazon
ACDELCO Fits: all 2021 XT6 engines	PT3728	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO PT3728 GM Original Equipment RAIN SENSORBLACK3-WAY MALEwith Leads0.75MM2	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	12126020	🇺🇸 US 🇨🇦 CA	FrontRight Fitment notes — GM GENUINE 12126020 FrontRightService Information Electric Code: B24RFMobile Telephone MicrophoneGreen2-Way Malewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	13507121	🇺🇸 US 🇨🇦 CA	BlackTerminal Gender: Male Female Fitment notes — GM GENUINE 13507121 BlackTerminal Gender: Male Female Si Electrical Code: B174WFrontview CameraWindshield12-Way Femalewithout Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	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: all 2021 XT6 engines	84724191	🇺🇸 US 🇨🇦 CA	Fits LeftSi Elec Code: E37TL Fitment notes — GM GENUINE 84724191 Fits: LeftSi Elec Code: E37TLGrayDome/Reading Lamps3rd Row4-Way Femalewith Leads or: RightSi Elec Code: E37TRGrayDome/Reading Lamps3rd Row4-Way Femalewith Leads	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: 3.6L V6	1713412	🇺🇸 US 🇨🇦 CA	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.

Hybrid Battery Voltage Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	S2860	🇺🇸 US 🇨🇦 CA	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 Hybrid Battery Voltage 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.

Ignition Coil Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 2.0L L4 Turbocharged	PT2923	🇺🇸 US 🇨🇦 CA	Crimping Tool Included: NoLength: 12 in Fitment notes — GM GENUINE PT2923 Crimping Tool Included: NoLength: 12 inBlack 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 Leads	View on Amazon
GM GENUINE Fits: 3.6L V6	85518225	🇺🇸 US 🇨🇦 CA	BlackGender: Male Fitment notes — GM GENUINE 85518225 BlackGender: MaleWire Gauge Measurement (GA.): 1.0 MM2 GA. 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 Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 XT6 engines	S2894	🇺🇸 US 🇨🇦 CA		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: all 2021 XT6 engines	84773558	🇺🇸 US 🇨🇦 CA	Si Elec Code: B107Natural with Black Cover Fitment notes — GM GENUINE 84773558 Si Elec Code: B107Natural with Black CoverAccelerator Pedal Position Sensor6-Way Femalewith Leads	View on Amazon
GM GENUINE Popular Fits: all 2021 XT6 engines	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
GM GENUINE Fits: all 2021 XT6 engines	PT313	🇺🇸 US 🇨🇦 CA	Service Information Electrical Code: S35Instrument Panel Compartment Lamp Switch Fitment notes — GM GENUINE PT313 Service Information Electrical Code: S35Instrument Panel Compartment Lamp SwitchBlue2-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT2560	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2560 Black Steering Column Lock ModuleSi Elec Code: K608-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	84724190	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 84724190 Black Si Elec Code: E40Electrical Auxiliary Heater X24-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3735	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3735 Black Si Elec Code: S36Instrument Panel Dimmer Switch.75mm26-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3779	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3779 Black Si Elec Code: P29Head-up Display X1.75mm28-Way Femalewith Leads	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	PT3695	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3695 Black Si Elec Code: M8Blower Motor6-Way Femalewith Leads5MM2/.75MM2	View on Amazon
GM GENUINE Fits: all 2021 XT6 engines	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

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.

Keyless Entry Module / Receiver Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 2.0L L4 Turbocharged	84867146	🇺🇸 US 🇨🇦 CA	GM Original Equipment Fitment notes — ACDELCO 84867146 GM Original Equipment 9 speed Automatic trans.BLACK2-WAY MALEwith Leads	View on Amazon

This table covers the harness connectors at the Keyless Entry Module / Receiver. 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: 3.6L V6	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
WELLS Fits: 3.6L V6	1P1571	🇺🇸 US 🇨🇦 CA		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: 3.6L V6	PT944	🇺🇸 US 🇨🇦 CA	Evaporator Emission Control ConnectorAt Fuel Tank Pressure Sensor	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
GM GENUINE Fits: 3.6L V6	86792094	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE 86792094 Black Si Elec Code: B74Manifold Absolute Pressure Sensor3-Way Femalewith LeadsTerminal PN 1418850-3	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.

Oil Pressure Sender / Switch Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.6L V6	PT2980	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2980 Black Si Elec Code: B37BEngine Oil Pressure Sensor3-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2882	🇺🇸 US 🇨🇦 CA	Connector Shape: RectangularHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S2882 Connector Shape: RectangularHarness Lengthinches: 12.25	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 Pump Control Valve / Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.6L V6	12690487	🇺🇸 US 🇨🇦 CA	Mating Connector Use 135873262-Way with Leads Fitment notes — GM GENUINE 12690487 Mating Connector Use 135873262-Way with LeadsJumper Wire	View on Amazon

This table covers the harness connectors at the Oil Pump Control Valve / Solenoid. 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: 3.6L V6	PT3921	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT3921 Black Si Elec Code: B36Engine Oil Temperature Sensor.75mm23-Way Femalewith Leads	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: 3.6L V6	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 Leadsor Si Elec Code: B52CHeated Oxygen SensorBank 1 Sensor 1Gray4-Way Femalewith Leadsor Si Elec Code: B52EHeated Oxygen SensorBank 2 Sensor 1Gray4-Way Femalewith Leads	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.

Parking Aid Sensor Connector

Brand	Part Number	Markets	Notes	Buy
HOLSTEIN Fits: 3.6L V6	2HAR0060	🇺🇸 US 🇨🇦 CA	Front And Rear	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2316	🇺🇸 US 🇨🇦 CA	Connector Shape: OvalNumber of Splice Connectors Included: 3 Fitment notes — STANDARD MOTOR PRODUCTS S2316 Connector Shape: OvalNumber of Splice Connectors Included: 3Front And Rear	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2820	🇺🇸 US 🇨🇦 CA	Rear	View on Amazon

This table covers the harness connectors at the Parking Aid 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.

Parking Brake Actuator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S1414	🇺🇸 US 🇨🇦 CA	Connector Shape: RectangleTerminal Type: Blade Fitment notes — STANDARD MOTOR PRODUCTS S1414 Connector Shape: RectangleTerminal Type: BladeWiring Harness Length (mm): 476.25Rear	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.

Radiator Fan Motor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2267	🇺🇸 US 🇨🇦 CA	Connector Shape: Round	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.

Speed Sensor Connector

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: 3.6L V6	645160	🇺🇸 US 🇨🇦 CA	Black Fitment notes — DORMAN 645160 Black 2 Way Female	View on Amazon

This table covers the harness connectors at the 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.

Steering Column Wiring Harness

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.6L V6	23188723	🇺🇸 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: 3.6L V6	PT2929	🇺🇸 US 🇨🇦 CA	Black Fitment notes — GM GENUINE PT2929 Black Si Elec Code: B34EEngine Coolant Temperature Sensor 52-Way Femalewith Leads	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S2860	🇺🇸 US 🇨🇦 CA	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 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.

Trailer Adapter Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: 3.6L V6	57101	🇺🇸 US 🇨🇦 CA	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 Connector

Brand	Part Number	Markets	Notes	Buy
CURT Popular Fits: 3.6L V6	56415	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	55415	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	56229	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	55515	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	56515	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	56325	🇺🇸 US 🇨🇦 CA	Custom Wiring Connector4-Way Flat	View on Amazon
CURT Fits: 3.6L V6	55774	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	57015	🇺🇸 US 🇨🇦 CA	OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket	View on Amazon
CURT Fits: 3.6L V6	55384	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	57020	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	56584	🇺🇸 US 🇨🇦 CA	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: 3.6L V6	56326	🇺🇸 US 🇨🇦 CA	Custom Wiring Connector7-Way Round RV Blade	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: 3.6L V6	56475	🇺🇸 US 🇨🇦 CA	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.

Transmission-Automatic Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Fits: 3.6L V6	24053077	🇺🇸 US 🇨🇦 CA	9 speed Automatic trans.with Oil Level Control Fitment notes — GM GENUINE 24053077 9 speed Automatic trans.with Oil Level ControlEtrs, with Valve Body Oil LVL control Components3.49 Ratio (FXC)	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.

Vapor Canister Vent Valve / Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: 3.6L V6	PT2160	🇺🇸 US 🇨🇦 CA	GoldShape: Square	View on Amazon
HOLSTEIN Fits: 3.6L V6	2HAR0035	🇺🇸 US 🇨🇦 CA	Includes ABS Wheel Speed Sensor Wire Harness	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	HP3945	🇺🇸 US 🇨🇦 CA	HandypackConnector Shape: Square Fitment notes — STANDARD MOTOR PRODUCTS HP3945 HandypackConnector Shape: SquareIncludes Wheel Speed Sensor Wiring HarnessBlackIncludes ABS Wheel Speed Sensor Wire Harness	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6	S824	🇺🇸 US 🇨🇦 CA	Connector Shape: SquareHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S824 Connector Shape: SquareHarness LengthIncludes ABS Wheel Speed Sensor Wire HarnessIncludes Wheel Speed Sensor Wiring Harnessinches: 7Length (In): 1.25Wiring Harness Length (mm): 209.55Black	View on Amazon

This table covers the harness connectors at the Vapor Canister Vent Valve / Solenoid. 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.

Wire Terminal

Brand	Part Number	Markets	Notes	Buy
GM GENUINE Popular Fits: 3.6L V6	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: 3.6L V6	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: 3.6L V6	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: 3.6L V6	13575850	🇺🇸 US 🇨🇦 CA	Multi-Purpose Fitment notes — GM GENUINE 13575850 Multi-Purpose Labeled 135758501.0MM2	View on Amazon
GM GENUINE Fits: 3.6L V6	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: 3.6L V6	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 Cadillac XT6

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. Some electrical connector parts fit every engine; others are 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 Engine Wiring Harness / Connector .

Frequently Asked Questions

How many electrical connector parts fit the 2021 Cadillac XT6?

Our catalog currently lists 128 electrical connector parts for the 2021 Cadillac XT6 across 41 subcategories and 11 brands, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Each part is matched to the engine(s) it fits.

Do electrical connector parts differ between 2021 Cadillac XT6 engines?

Some do. 70 parts fit every engine; the other 58 are engine-specific. Each row (and the filter at the top) shows which. 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 Cadillac XT6?

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 Cadillac XT6 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 Cadillac XT6?

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 Cadillac XT6

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

Electrical Connector Parts for Other Cadillac XT6 Years

2025 Cadillac XT6 2024 Cadillac XT6 2023 Cadillac XT6 2022 Cadillac XT6 2020 Cadillac XT6

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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