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 1545 (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 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Cellular Microphone Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | GRY | 655 | Cellular Microphone Low Reference |
| B | DK GRN | 654 | Cellular Microphone Signal |
Vehicle Communication Interface Module (VCIM) Connector End View C1
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | - | - | Not Used |
| 2 | BRN/WHT | 2517 | Keypad Red LED Signal |
| 3 | YEL/BLK | 2516 | Keypad Green LED Signal |
| 4-5 | - | - | Not Used |
| 6 | LT GRN BLK |
2515 | Keypad Supply Voltage |
| 7 | BLK | 1450 | Ground |
| 8 | BLK | 1450 | Ground |
| 9-10 | - | - | Not Used |
| 11 | DK GRN/ WHT |
2514 | Keypad Signal |
| 12-14 | - | - | Not Used |
| 15 | ORN | 3140 | Battery Positive Voltage |
| 16 | ORN | 3140 | Battery Positive Voltage |
Vehicle Communication Interface Module (VCIM) Connector End View C2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | BRN/WHT | 367 | Remote Radio Left Audio Signal |
| 2 | BLK/WHT | 372 | Remote Radio Audio Output (-) |
| 3-5 | - | - | Not Used |
| 6 | ORN | 1044 | Radio Class 2 Serial Data |
| 7 | - | - | Not Used |
| 8 | BARE | 1705 | Drain Wire |
| 9 | DK GRN | 654 | Cellular Microphone Signal |
| 10 | GRY | 655 | Cellular Microphone Low Reference |
| 11-12 | - | - | Not Used |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.