2003 Hummer H2FACTORY OEM SERVICE PROCEDURE

Removal Procedure

WARNING: This page is about a different car, the 2004 Hummer H2. 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 I/P center trim panel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center in Instrument Panel, Gages, and Console.
    2. Fig 1: Communication Interface Module & I/P
    GM815865Courtesy of GENERAL MOTORS CORP.
  2. Remove the screws that hold the communication interface module to the I/P.
    3. Fig 2: Communication Interface Module
    GM865085Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the antenna and the electrical connections from the communication interface module.
  4. Remove the communication interface module.
Factory Service Tools

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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.

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