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 MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 970 (CELLULAR COMMUNICATION SYSTEM)REPAIR INSTRUCTIONSCOMMUNICATION INTERFACE MODULE REPLACEMENTINSTALLATION PROCEDURE

2002 Chevrolet Avalanche 2500, RWD

Installation Procedure

2002 Chevrolet Avalanche 2500, RWDSECTION Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

When replacing a VCIM, record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
Connect the electrical connectors to the module.
Connect the cell antenna coaxial cable to the VCIM.
NOTE: Refer to Fastener Notice in Cautions and Notices.
Install the screws that secure the bracket to the instrument panel brace.

Fig 1: Locating VCIM Bracket To Instrument Panel Metal Brace Screws
Courtesy of GENERAL MOTORS CORP.

Tighten: Tighten the screws to 10 N.m (89 lb in).
Install the I/P compartment. Refer to Compartment Replacement - Instrument Panel (I/P) in Instrument Panel, Gages and Console.
Install the right insulator panel. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gages and Console.
IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar® 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® system. This action will cause a DTC to set.
Reconfigure the OnStar® system. Refer to OnStar Reconfiguration .

RENDER: 1.0x

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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.