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.
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HOMESERVICE MANUALSCHEVROLET2001C3500 HD 8.1 G, AUTOMATICREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCELLULAR COMMUNICATION SYSTEMCOMPONENT LOCATORCELLULAR COMMUNICATION CONNECTOR END VIEWSVEHICLE INTERFACE UNIT (VIU) CONTROL MODULE - C2
2001 Chevrolet C3500 HD 8.1 G, Automatic
Vehicle Interface Unit (VIU) Control Module - C2
2001 Chevrolet C3500 HD 8.1 G, AutomaticSECTION Vehicle Interface Unit (VIU) Control Module - C2
Vehicle Interface Unit (VIU) Control Module - C2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| E1 | BLK | 1850 | Ground |
| E2-E3 | - | - | Not Used |
| E4 | DK GRN/WHT | 2514 | Keypad Signal |
| E5 | YEL/BLK | 2516 | Keypad Green LED Signal |
| E6 | LT GRN/BLK | 2515 | Keypad Supply Voltage |
| E7-E15 | - | - | Not Used |
| E16 | ORN | 2240 | Battery Positive Voltage |
| F1 | BLK | 1850 | Ground |
| F2-F3 | - | - | Not Used |
| F4 | ORN/BLK | 2518 | Keypad Low Reference |
| F5 | - | - | Not Used |
| F6 | PNK | 739 | Ignition 1 Voltage & UE1 |
| F7-F8 | - | - | Not Used |
| F9 | BRN/WHT | 2517 | Keypad Red LED Signal |
| F10 | - | - | Not Used |
| F11 | BLK | 707 | RAP Relay Coil Supply Voltage & UE1 |
| F12-F15 | - | - | Not Used |
| F16 | ORN | 2240 | Battery Positive Voltage |
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.