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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1405 (Cellular Communication System) >> Repair Instructions >> Communication Interface Module Replacement (TrailBlazer, Envoy, Bravada) >> Installation Procedure
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Installation Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  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 to the upper bracket ensuring the retaining tab is fully seated.
    3. NOTE: In order to avoid damage to the circuit board, do NOT over-tighten the thumb screws. Using your fingers, apply only a light pressure.
    Fig 1: VCIM Electrical Connectors
    GM741627Courtesy of GENERAL MOTORS CORP.
  3. Connect the 2 electrical connectors.

    Tighten:  Tighten the module thumb screw to a maximum of 0.2 N.m (2 lb in).

    4. Fig 2: Installing VCIM Protective Cover
    GM742196Courtesy of GENERAL MOTORS CORP.
  4. Install the protective cover to the module.
  5. Position the right rear seat bottom to a passenger position.
    6. 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.
  6. Install the scan tool. Use the special functions menu in order to perform the OnStar® setup procedure for this vehicle.
  7. Move the vehicle to an open area that is away from tall buildings and with a clear view of unobstructed sky. Allow the vehicle to run for 10 minutes.
  8. Use the ID information menu on the scan tool to access the new station ID (STID) and the electronic serial number (ESN) from the new VCIM.
  9. Press the blue OnStar® button to connect to the OnStar® Call Center and perform the following procedure:
    1. Tell the advisor that this vehicle has received a new VCIM.
    2. Ask the advisor to add the new STID and the ESN to update the customer's account.
    3. Follow any additional instructions from the OnStar® advisor.
    4. Ask the advisor to activate the OnStar® Personal Calling feature, if available.
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