Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1681 (CELLULAR COMMUNICATION SYSTEM)COMPONENT LOCATORCELLULAR COMMUNICATION CONNECTOR END VIEWS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Cellular Communication Connector End Views
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Cellular Communication Connector End Views
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Communication Interface Module (VCIM) C1
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | - | - | Not Used |
| 2 | BN/WH | 2517 | Keypad Red LED Signal |
| 3 | YE/BK | 2516 | Keypad Green LED Signal |
| 4-5 | - | - | Not Used |
| 6 | L-GN/BK | 2515 | Keypad Supply Signal |
| 7 | BK/WH | 151 | Ground |
| 8 | BK/WH | 151 | Ground (2002, Early 2003) |
| 9-10 | - | - | Not Used |
| 11 | D-GN/WH | 2514 | Keypad Signal |
| 12-14 | - | - | Not Used |
| 15 | OG | 1640 | Battery Positive Voltage (2002, Early 2003) |
| 16 | OG | 1640 | Battery Positive Voltage |
Vehicle Communication Interface Module (VCIM) C2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | BN/WH | 367 | Left Audio Signal |
| 2 | BK/WH | 372 | Audio Common |
| 3-5 | - | - | Not Used |
| 6 | PU | 1807 | Class 2 Serial Data |
| 7 | D-GN/WH | 368 | Right Audio Signal |
| 8 | BARE | 814 | Drain Wire |
| 9 | GY | 655 | Cellular Microphone Signal |
| 10 | BARE | 654 | Cellular Microphone Low Reference |
| 11 | - | - | Not Used |
| 12 | YE/BK | 693 | Cellular Telephone Mute Signal |
Cellular Telephone Microphone
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| A | BARE | 654 | Cellular Microphone Low Reference |
| B | GY | 655 | Cellular Microphone Signal |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.