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Home >> Chevrolet >> 2004 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Cellular Communication System >> Repair Instructions >> Communication Interface Module Replacement >> Installation Procedure
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Installation Procedure

  1. 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.
  2. Slide the communication interface module (3) into the bracket.
    3. Fig 1: Sliding Communication Interface Module Into Bracket
    GM871218Courtesy of GENERAL MOTORS CORP.
  3. Push in on the module (3) at the retaining tab (2) until an audible click is heard indicating the module is secured to the bracket.
  4. Connect the electrical connectors and the coaxial cable (2) to the communication interface module (3).
    5. 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.
  5. Reconfigure the OnStar® system. Refer to OnStar Reconfiguration .
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