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Installation Procedure

    Fig 1: Communication Interface Module & Bolts
    GM1364564Courtesy of GENERAL MOTORS CORP.
  1. Record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
  2. Position the communication interface module to the bracket (2).
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the communication interface module bolts (1).

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  4. Connect the GPS antenna cable to the module.
    5. Fig 2: Communication Interface Module Electrical Connectors
    GM813766Courtesy of GENERAL MOTORS CORP.
  5. Connect the electrical connectors to the module.
  6. Connect the cellular antenna cable to the module.
    7. IMPORTANT: After replacing the communication interface module, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair.
  7. Reconfigure the OnStar® system. Refer to OnStar Reconfiguration (Gen 6)  or OnStar Reconfiguration (Gen 6.1) .
    8. Fig 3: Communication Interface Module Bracket Nuts
    GM769963Courtesy of GENERAL MOTORS CORP.
  8. Position the assembly to the studs.
  9. Install the bracket nuts to the communication interface module.

    Tighten:  Tighten the nuts to 4 N.m (35 lb in).

    10. Fig 4: Communication Interface Module Cover
    GM769971Courtesy of GENERAL MOTORS CORP.
  10. Install the communication interface module cover.
  11. Close the rear compartment.
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