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HOMESERVICE MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 838 (CELLULAR COMMUNICATION SYSTEM)REPAIR INSTRUCTIONSCOMMUNICATION INTERFACE MODULE REPLACEMENTREMOVAL PROCEDURE
2002 Chevrolet Avalanche 2500, RWD

Removal Procedure

2002 Chevrolet Avalanche 2500, RWDSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    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 and the 11-digit electronic serial number, are used by the National Cellular Network and OnStar® 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.
  1. Remove the Instrument Panel (I/P) upper trim panel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Upper in Instrument Panel, Gages and Console.
  2. Fully open the I/P storage compartment.
  3. Disconnect the electrical connectors (2) from the Vehicle Communication Interface module (VCIM) (1).
    Fig 1: Vehicle Communication Interface Module (VCIM)
    GM854863Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the coaxial cable (3) from the VCIM.
    5. Fig 2: Locating Passenger Side Upper I/P Support
    GM1260587Courtesy of GENERAL MOTORS CORP.
  5. Remove the screws (1, 3) from the passenger side upper I/P support (2).
  6. Remove the passenger side upper I/P support (2).
    7. Fig 3: Removing Screw (1) Retaining The VCIM Bracket To The I/P
    GM1260499Courtesy of GENERAL MOTORS CORP.
  7. Remove the screw (1) retaining the VCIM bracket to the I/P.
  8. Remove the retainer from the VCIM bracket.
  9. Remove the nuts holding the mounting brackets to the VCIM.
  10. If necessary, move the cross-car duct forward slightly in order to make room for the removal of the module.
    11. Fig 4: Removing The Vcim And Bracket Assembly
    GM1260503Courtesy of GENERAL MOTORS CORP.
  11. Remove the VCIM and bracket assembly from the I/P.
    12. Fig 5: Removing Nuts (4) From The VCIM Mounting Brackets
    GM1260485Courtesy of GENERAL MOTORS CORP.
  12. Remove the nuts (4) from the VCIM mounting brackets (2).
  13. Remove the mounting brackets (2) from the VCIM (1).
RENDER: 1.0x

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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.