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 MANUALSCHEVROLET2004TAHOE 2WD V8-4.8L VIN VREPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTGLOBAL POSITIONING SYSTEMGLOBAL POSITIONING SYSTEM MODULESERVICE AND REPAIR
2004 Chevrolet Tahoe 2WD V8-4.8L VIN V
Global Positioning System Module: Service and Repair
2004 Chevrolet Tahoe 2WD V8-4.8L VIN VSECTION Service and Repair
COMMUNICATION INTERFACE MODULE REPLACEMENT
REMOVAL PROCEDURE
1. Remove the instrument panel (I/P) top trim panel.
IMPORTANT: The vehicle communication interface module (VCIM) has a specific set of unique numbers that tie the module to each vehicle. These numbers, the 10-digit station identification (STID) and the 11-digit electronic serial number (ESN), are used by the National Cellular Network and OnStar(R) to identify the specific vehicle. Because these numbers are tied to the vehicle identification number of the vehicle, you must never exchange these parts with those of another vehicle.
2. Disconnect the wire connectors (2) from the module.
3. Disconnect the coaxial cable (3) from the module.
4. Remove the nuts (2) retaining the module to the bracket.
5. Remove the module (3) from the vehicle.
INSTALLATION PROCEDURE
1. If replacing the VCIM, record the 10-digit STID number, and the 11-digit ESN number from the labels on the new module.
2. Install the module on the bracket.
3. Install the retaining nuts (2).
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the nuts to 1.6 N.m (14 lb in).
4. Connect the coaxial cable (3) to the module.
5. Connect the wire connectors (2) to the module.
6. Install the I/P trim panel.
7. Reconfigure the OnStar(R) system. Refer to OnStar Reconfiguration.
IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar(R) system. Failure to reconfigure the system will result in an additional customer visit for repair. In addition, pressing and holding the white dot button on the keypad will NOT reset this version of the OnStar(R) system. This action will cause a DTC to set.
REMOVAL PROCEDURE
1. Remove the instrument panel (I/P) top trim panel.
IMPORTANT: The vehicle communication interface module (VCIM) has a specific set of unique numbers that tie the module to each vehicle. These numbers, the 10-digit station identification (STID) and the 11-digit electronic serial number (ESN), are used by the National Cellular Network and OnStar(R) to identify the specific vehicle. Because these numbers are tied to the vehicle identification number of the vehicle, you must never exchange these parts with those of another vehicle.
2. Disconnect the wire connectors (2) from the module.
3. Disconnect the coaxial cable (3) from the module.
4. Remove the nuts (2) retaining the module to the bracket.
5. Remove the module (3) from the vehicle.
INSTALLATION PROCEDURE
1. If replacing the VCIM, record the 10-digit STID number, and the 11-digit ESN number from the labels on the new module.
2. Install the module on the bracket.
3. Install the retaining nuts (2).
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the nuts to 1.6 N.m (14 lb in).
4. Connect the coaxial cable (3) to the module.
5. Connect the wire connectors (2) to the module.
6. Install the I/P trim panel.
7. Reconfigure the OnStar(R) system. Refer to OnStar Reconfiguration.
IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar(R) system. Failure to reconfigure the system will result in an additional customer visit for repair. In addition, pressing and holding the white dot button on the keypad will NOT reset this version of the OnStar(R) system. This action will cause a DTC to set.
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.