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Home >> Buick >> 2003 >> Century Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular Communication System >> Repair Instructions >> Communication Interface Module Replacement >> Installation Procedure
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Installation Procedure

  1. If you are replacing the VCIM, record the 10-digit standard identification (STID) number and the 11-digit electronic serial number (ESN) from the labels on the new module.
  2. Align the connector side of the module to the large cutout on the plastic bracket. Insert the module into the plastic bracket. Make sure the small GPS connector is inserted into the small round hole in the plastic bracket.
    Fig 1: Inserting Communication Interface Module Into Plastic Bracket
    G01587351Courtesy of GENERAL MOTORS CORP.
  3. Spread the large tang side of the plastic bracket over the edge of the module. The bottom, undercut edge of the plastic bracket will snap over the bottom of the module when fully seated.
    Fig 2: Seating Bottom Undercut Edge Of Plastic Bracket Over Bottom Of Module
    G01587352Courtesy of GENERAL MOTORS CORP.
  4. The connectors on the module must be outboard. Slide the plastic bracket assembly outboard, under the metal bracket.
  5. Engage the outboard plastic tabs to the outboard edge of the metal bracket.
  6. Squeeze the plastic bracket assembly upward until the large, plastic snap-fingers engage on the inboard edge of the metal bracket.
    Fig 3: Installing Plastic Bracket Assembly Into Metal Bracket
    G01587353Courtesy of GENERAL MOTORS CORP.
    NOTE: Before you install the antenna cable connector of the global positioning system (GPS) to the vehicle communication interface module (VCM), align the connector properly in order to avoid damaging the connector.
  7. Gently connect the GPS antenna cable to the module by pushing inward on the circular metal sleeve.
  8. Connect the 2 lower connectors to the module.
  9. Connect the cellular antenna cable to the module by pushing inward on the square plastic housing.
    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.
  10. Install the scan tool. Use the special functions menu in order to perform the OnStar® setup procedure for this vehicle.
  11. 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.
  12. 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.
  13. Press the blue OnStar® button to connect to the OnStar® Call Center and perform the following procedure:
    1. 13.1. Tell the advisor that this vehicle has received a new VCIM.
    2. 13.2. Ask the advisor to add the new STID and the ESN to update the customer's account.
    3. 13.3. Follow any additional instructions from the OnStar® advisor.
    4. 13.4. Ask the advisor to activate the OnStar® Personal Calling feature, if available.
  14. Position the assembly to the studs.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  15. Install the communication interface module nuts.

    Tighten 

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

    Fig 4: Installing Communication Interface Module Nuts
    G01587354Courtesy of GENERAL MOTORS CORP.
  16. Install the plastic OnStar® cover.
    Fig 5: Installing Plastic OnStar® Cover
    G01587355Courtesy of GENERAL MOTORS CORP.
  17. Close the rear compartment.
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