The 2021 Chevrolet Express 4500 has 127 electrical connector parts with verified fitment on this page — 29 part types and 9 brands, covering the 6.6L V8 engine. Each part includes a manufacturer part number and application notes.
The connector system on the 2021 Chevrolet Express 4500 supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. The largest groups are Instrument Panel Connector (24 parts), Engine Wiring Harness / Connector (17 parts) and Chassis Wiring Harness / Connector (13 parts). The other 26 part types cover the remaining 73 parts.
The 2021 Chevrolet Express 4500 came with a single engine, the 6.6L V8, and every part is verified against it.
9 brands supply electrical connector parts for the 2021 Chevrolet Express 4500, led by GM GENUINE (99 parts), ACDELCO (11 parts) and STANDARD MOTOR PRODUCTS (10 parts), plus 6 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Chevrolet Express 4500. 21 parts have it, including GM GENUINE PT146 (Body Wiring Harness / Connector) and GM GENUINE PT2612 (Chassis Wiring Harness / Connector). Each part number opens a page with every vehicle that part fits.
A/C Compressor Clutch Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 70048 | 🇺🇸 US 🇨🇦 CA | 2 Terminal Malewithout Diode | View on Amazon |
This table covers the harness connectors at the A/C Compressor Clutch 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.
This group shows a single part: FOUR SEASONS 70048.
Acceleration Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 645234 | 🇺🇸 US 🇨🇦 CA | 6 Cavity | View on Amazon |
This table covers the harness connectors at the Acceleration 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.
This group shows a single part: DORMAN 645234.
Air Intake / Charge Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | PT2922 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B75CMultifunction Intake Air Sensor | View on Amazon |
| GM GENUINE | PT3827 | 🇺🇸 US 🇨🇦 CA | Fits Si Elec Code: B193ADK Gray | View on Amazon |
| GM GENUINE | 84677313 | 🇺🇸 US 🇨🇦 CA | Black | 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.
GM GENUINE supplies the 3 Air Intake / Charge Temperature Sensor Connector parts for the 2021 Chevrolet Express 4500.
This group includes GM GENUINE PT2922, GM GENUINE PT3827 and GM GENUINE 84677313.
Alternator / Generator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 84941154 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT2971 | 🇺🇸 US 🇨🇦 CA | Gender: MaleTerminal Type: Blade | 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.
2 Alternator / Generator Connector parts for the 2021 Chevrolet Express 4500 come from 2 brands — ACDELCO and GM GENUINE.
This group includes ACDELCO 84941154 and GM GENUINE PT2971.
Blower Motor Control Module / Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1712230 | 🇺🇸 US 🇨🇦 CA | Blower Motor Resistor Pigtail | 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.
One part is listed for the 2021 Chevrolet Express 4500 — GPD 1712230.
Body Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | PT146 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT2726 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT213 | 🇺🇸 US 🇨🇦 CA | RightSliding Door Jamb Contact Plate | View on Amazon |
| GM GENUINE | PT240 | 🇺🇸 US 🇨🇦 CA | RightSi Elec Code: B28F | View on Amazon |
| GM GENUINE | PT2719 | 🇺🇸 US 🇨🇦 CA | BlackLength: 8.5 In | View on Amazon |
| GM GENUINE | PT267 | 🇺🇸 US 🇨🇦 CA | Service Information Electrical Code: X407Gray | View on Amazon |
| GM GENUINE | PT2623 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT1475 | 🇺🇸 US 🇨🇦 CA | Terminal Type: Blade PinBlack | View on Amazon |
| GM GENUINE | PT3907 | 🇺🇸 US 🇨🇦 CA | Black | 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.
GM GENUINE supplies the 9 Body Wiring Harness / Connector parts for the 2021 Chevrolet Express 4500. GM GENUINE PT146 carries the "Popular" badge.
Part numbers include GM GENUINE PT146, GM GENUINE PT2726 and GM GENUINE PT213, among others listed above.
Brake Fluid Level Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2860 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalGauge: 16 Gauge | View on Amazon |
This table covers the harness connectors at the Brake Fluid Level 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.
One part is listed for the 2021 Chevrolet Express 4500 — STANDARD MOTOR PRODUCTS S2860.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | PT3940 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| GM GENUINE | 84928314 | 🇺🇸 US 🇨🇦 CA | Black | 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.
2 Camshaft Position Sensor Connector parts for the 2021 Chevrolet Express 4500 come from 2 brands — ACDELCO and GM GENUINE.
Part numbers include ACDELCO PT3940 and GM GENUINE 84928314.
Chassis Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | PT2612 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT3910 | 🇺🇸 US 🇨🇦 CA | Service Information Electrical Code: G7Gray | View on Amazon |
| GM GENUINE Popular | PT2618 | 🇺🇸 US 🇨🇦 CA | BlackGender: Male | View on Amazon |
| ACDELCO | 84727362 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| ACDELCO | PT3940 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| GM GENUINE | PT247 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3505 | 🇺🇸 US 🇨🇦 CA | BlackCrimping Tool Included: No | View on Amazon |
| GM GENUINE | PT3691 | 🇺🇸 US 🇨🇦 CA | RearRight | View on Amazon |
| GM GENUINE | PT3912 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B150Natural | View on Amazon |
| GM GENUINE | PT3445 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B131CGray | View on Amazon |
| GM GENUINE | PT3509 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3592 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: X102LT Gray | View on Amazon |
| GM GENUINE | PT1589 | 🇺🇸 US 🇨🇦 CA | Black | 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.
13 Chassis Wiring Harness / Connector parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE and ACDELCO. GM GENUINE PT2612 carries the "Popular" badge.
Coolant Level Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | PT3910 | 🇺🇸 US 🇨🇦 CA | Service Information Electrical Code: B33Gray | View on Amazon |
This table covers the harness connectors at the Coolant Level 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.
This group shows a single part: GM GENUINE PT3910.
Crankshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | PT3940 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | 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.
This group shows a single part: ACDELCO PT3940.
Engine Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | PT2974 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT209 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: Q2Gray | View on Amazon |
| GM GENUINE Popular | PT2830 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT1134 | 🇺🇸 US 🇨🇦 CA | Si Electrical Code: R3Gray | View on Amazon |
| ACDELCO | 84941154 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT1511 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3910 | 🇺🇸 US 🇨🇦 CA | Fits Service Information Electrical Code: B1BGray | View on Amazon |
| GM GENUINE | 87815146 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT2923 | 🇺🇸 US 🇨🇦 CA | Crimping Tool Included: NoLength: 12 in | View on Amazon |
| GM GENUINE | PT2971 | 🇺🇸 US 🇨🇦 CA | Gender: MaleTerminal Type: Blade | View on Amazon |
| GM GENUINE | PT2929 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3612 | 🇺🇸 US 🇨🇦 CA | BlackTerminal Gender: Female | View on Amazon |
| GM GENUINE | PT3509 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3098 | 🇺🇸 US 🇨🇦 CA | BlackLength: 8 In | View on Amazon |
| GM GENUINE | PT3534 | 🇺🇸 US 🇨🇦 CA | BlackShape: Oval | View on Amazon |
| GM GENUINE | PT3793 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: Q14Exhaust Gas Recirculation Valve | View on Amazon |
| GM GENUINE | 84880894 | 🇺🇸 US 🇨🇦 CA | Black | 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.
17 Engine Wiring Harness / Connector parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE and ACDELCO. GM GENUINE PT2974 carries the "Popular" badge.
Exhaust Gas Temperature (EGT) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 84727362 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| GM GENUINE | PT3445 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B130AGray | 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.
2 Exhaust Gas Temperature (EGT) Sensor Connector parts for the 2021 Chevrolet Express 4500 come from 2 brands — ACDELCO and GM GENUINE.
Part numbers include ACDELCO 84727362 and GM GENUINE PT3445.
Fuel Injection Pressure Regulator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 84941154 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT2971 | 🇺🇸 US 🇨🇦 CA | Gender: MaleTerminal Type: Blade | View on Amazon |
| GM GENUINE | PT3508 | 🇺🇸 US 🇨🇦 CA | BlackShape: Oval | 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.
3 Fuel Injection Pressure Regulator Connector parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE and ACDELCO.
Listed part numbers: ACDELCO 84941154, GM GENUINE PT2971 and GM GENUINE PT3508.
Fuel Injector Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GB REMANUFACTURING | 5191 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GM GENUINE | PT3739 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 19352907 | 🇺🇸 US 🇨🇦 CA | Black | 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.
3 Fuel Injector Connector parts for the 2021 Chevrolet Express 4500 come from 2 brands — GM GENUINE and GB REMANUFACTURING.
This group includes GB REMANUFACTURING 5191, GM GENUINE PT3739 and GM GENUINE 19352907.
Headlamp Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | PT2965 | 🇺🇸 US 🇨🇦 CA | Fits LeftSi Elec Code: E4G | View on Amazon |
| GM GENUINE Popular | PT168 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT248 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B9Green | View on Amazon |
| GM GENUINE | PT247 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3855 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT114 | 🇺🇸 US 🇨🇦 CA | Shape: RectangularBlack | View on Amazon |
| GM GENUINE | PT1484 | 🇺🇸 US 🇨🇦 CA | Black | 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.
GM GENUINE supplies the 7 Headlamp Wiring Harness / Connector parts for the 2021 Chevrolet Express 4500. GM GENUINE PT2965 carries the "Popular" badge.
This group includes GM GENUINE PT2965, GM GENUINE PT168 and GM GENUINE PT248 and the remaining parts above.
Headliner Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | PT2834 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| GM GENUINE Popular | PT2726 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT150 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: S34FNatural | View on Amazon |
| GM GENUINE | PT1404 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 13576634 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 13577390 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 13584788 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 19369662 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT210 | 🇺🇸 US 🇨🇦 CA | Black | 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.
9 Headliner Connector parts for the 2021 Chevrolet Express 4500 come from 2 brands — GM GENUINE and ACDELCO. The "Popular" part is ACDELCO PT2834.
Listed part numbers: ACDELCO PT2834, GM GENUINE PT2726 and GM GENUINE PT150, plus the other parts above.
HVAC Control Switch / Panel Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 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.
This group shows a single part: GPD 1713412.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | HP4485 | 🇺🇸 US 🇨🇦 CA | HandypackWiring Harness Length (mm): 304.8 | View on Amazon |
| ACDELCO | PT2368 | 🇺🇸 US 🇨🇦 CA | GoldShape: Rectangle | View on Amazon |
| GM GENUINE | PT3886 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| STANDARD MOTOR PRODUCTS | S761 | 🇺🇸 US 🇨🇦 CA | Wiring Harness Length (mm): 304.8 | View on Amazon |
| STANDARD MOTOR PRODUCTS | S2903 | 🇺🇸 US 🇨🇦 CA | Updated Design | 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.
5 Ignition Coil Connector parts for the 2021 Chevrolet Express 4500 come from 3 brands — STANDARD MOTOR PRODUCTS, ACDELCO and GM GENUINE. The "Popular" part is STANDARD MOTOR PRODUCTS HP4485.
This group includes STANDARD MOTOR PRODUCTS HP4485, ACDELCO PT2368 and GM GENUINE PT3886 and the remaining parts above.
Instrument Panel Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | PT2830 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT3910 | 🇺🇸 US 🇨🇦 CA | Service Information Electrical Code: X141Instrument Panel Harness to Brake Fluid Level Switch Harness | View on Amazon |
| GM GENUINE Popular | PT288 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT3847 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular | PT1346 | 🇺🇸 US 🇨🇦 CA | BlackConnector | View on Amazon |
| GM GENUINE | PT146 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT1165 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: X220Instrument Panel Harness To Park Brake Switch Jumper Harness | View on Amazon |
| GM GENUINE | PT319 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT548 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT2836 | 🇺🇸 US 🇨🇦 CA | YellowSi Elec Code: X330 | View on Amazon |
| GM GENUINE | PT2773 | 🇺🇸 US 🇨🇦 CA | Service Information Electrical Code: K77Remote Control Door Lock Receiver | View on Amazon |
| GM GENUINE | PT1071 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT382 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT3865 | 🇺🇸 US 🇨🇦 CA | Fits Si Electrical Code: X80AGray | View on Amazon |
| GM GENUINE | PT3736 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: X206LT Gray | View on Amazon |
| GM GENUINE | PT2038 | 🇺🇸 US 🇨🇦 CA | YellowSteering Wheel Air Bag Coil X3 | View on Amazon |
| GM GENUINE | PT1101 | 🇺🇸 US 🇨🇦 CA | Splice PackSi Elec Code: JX200 | View on Amazon |
| GM GENUINE | PT3667 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: K182Parking Assist Control Module X2 | View on Amazon |
| GM GENUINE | PT1502 | 🇺🇸 US 🇨🇦 CA | Telematics Communication Interface Control Module X2Si Electric Code: K73 | View on Amazon |
| GM GENUINE | PT1404 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | PT2888 | 🇺🇸 US 🇨🇦 CA | Windshield Wiper MotorService Information Electrical Code: M75 | View on Amazon |
| GM GENUINE | PT3799 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 84683650 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B22Natural | View on Amazon |
| HOLSTEIN | 2HAR0023 | 🇺🇸 US 🇨🇦 CA | Blackwith 3 Female Terminals | 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.
24 Instrument Panel Connector parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE and HOLSTEIN. GM GENUINE PT2830 carries the "Popular" badge.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 19301207 | 🇺🇸 US 🇨🇦 CA | Black | 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.
This group shows a single part: GM GENUINE 19301207.
Oil Pressure Sender / Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | PT2980 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 86801953 | 🇺🇸 US 🇨🇦 CA | Black | 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.
GM GENUINE supplies both parts for the 2021 Chevrolet Express 4500.
Listed part numbers: GM GENUINE PT2980 and GM GENUINE 86801953.
Oil Pump Control Valve / Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 12681015 | 🇺🇸 US 🇨🇦 CA | Mating Connector Use 13587326Jumper 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.
One part is listed for the 2021 Chevrolet Express 4500 — GM GENUINE 12681015.
Oil Temperature Sender Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | PT2930 | 🇺🇸 US 🇨🇦 CA | Si Elec Code: B36Gray | 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.
One part is listed for the 2021 Chevrolet Express 4500 — GM GENUINE PT2930.
Oxygen (O2) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | PT3353 | 🇺🇸 US 🇨🇦 CA | Fits Si Elec Code: B52FHeated Oxygen Sensor | View on Amazon |
| GM GENUINE | 85877333 | 🇺🇸 US 🇨🇦 CA | Black | 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.
2 Oxygen (O2) Sensor Connector parts for the 2021 Chevrolet Express 4500 come from GM GENUINE.
Listed part numbers: GM GENUINE PT3353 and GM GENUINE 85877333.
Power Window Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | PT2372 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS | S804 | 🇺🇸 US 🇨🇦 CA | Length (In): 0.875Wire Gauge (GA): 14 | View on Amazon |
| STANDARD MOTOR PRODUCTS | S1793 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the harness connectors at the Power Window 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.
3 Power Window Switch Connector parts are listed for the 2021 Chevrolet Express 4500, from STANDARD MOTOR PRODUCTS and ACDELCO.
Part numbers include ACDELCO PT2372, STANDARD MOTOR PRODUCTS S804 and STANDARD MOTOR PRODUCTS S1793.
Steering Column Wiring Harness
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 84026839 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Steering Column Wiring harnesses.
This group shows a single part: GM GENUINE 84026839.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | TC656 | 🇺🇸 US 🇨🇦 CA | with Towing PackageOE Style | View on Amazon |
| SKP | SK14986AB | 🇺🇸 US 🇨🇦 CA | 7-Way and 4-Way Connector with Universal Bracketwith Towing Package | View on Amazon |
| STANDARD MOTOR PRODUCTS | TC654 | 🇺🇸 US 🇨🇦 CA | with Towing Packagewith 7 Way | View on Amazon |
| STANDARD MOTOR PRODUCTS | TC652 | 🇺🇸 US 🇨🇦 CA | Aftermarket Stylewith Towing Package | View on Amazon |
| STANDARD MOTOR PRODUCTS | TC655 | 🇺🇸 US 🇨🇦 CA | Aftermarket Style7 Way RV To 4 Way | 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.
5 Trailer Connector parts are listed for the 2021 Chevrolet Express 4500, from STANDARD MOTOR PRODUCTS and SKP. STANDARD MOTOR PRODUCTS TC656 carries the "Popular" badge.
This group includes STANDARD MOTOR PRODUCTS TC656, SKP SK14986AB and STANDARD MOTOR PRODUCTS TC654 and the remaining parts above.
Wire Terminal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 13582308 | 🇺🇸 US 🇨🇦 CA | Multi-PurposeWire Gauge Measurement: 1.00 GU | View on Amazon |
| GM GENUINE | 19351723 | 🇺🇸 US 🇨🇦 CA | Multi-PurposeWire Gauge Measurement: 2.00 GU | View on Amazon |
| GM GENUINE | 13576369 | 🇺🇸 US 🇨🇦 CA | Multi-PurposeWire Gauge Measurement: 0.50 GU | View on Amazon |
| GM GENUINE | 13576377 | 🇺🇸 US 🇨🇦 CA | Multi-PurposeWire Gauge Measurement: 6.00 GU | View on Amazon |
| GM GENUINE | 19119395 | 🇺🇸 US 🇨🇦 CA | Multi-PurposeWire Gauge Measurement: 1.00 GU | View on Amazon |
This table covers the terminals crimped onto a harness lead.
5 Wire Terminal parts for the 2021 Chevrolet Express 4500 come from GM GENUINE. The "Popular" part is GM GENUINE 13582308.
Part numbers include GM GENUINE 13582308, GM GENUINE 19351723 and GM GENUINE 13576369, among others listed above.
Buying Electrical Connector Parts for a 2021 Chevrolet Express 4500
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Confirm you have the 6.6L V8 engine — every part on this page is matched to it.
- 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: Instrument Panel Connector and Engine Wiring Harness / Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 Chevrolet Express 4500?
Our catalog currently lists 127 electrical connector parts for the 2021 Chevrolet Express 4500 across 29 subcategories and 9 brands, covering the 6.6L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical connector problems on a 2021 Chevrolet Express 4500?
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 Express 4500 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 Express 4500?
Every part on this page is matched to the 6.6L V8 engine. 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 Express 4500
Electrical Connector Parts for Other Chevrolet Express 4500 Years
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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.