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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular Communication System >> Repair Instructions >> OnStar Vehicle Interface Unit (VIU) Replacement >> Removal Procedure

Removal Procedure

    IMPORTANT: The vehicle interface unit (VIU) 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 IP trim panel. Refer to TRIM PANEL REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER .
    2. Fig 1: Removing Screws
    GM661489Courtesy of GENERAL MOTORS CORP.
  2. Remove the 2 screws (1) securing the VIU to the bracket.
  3. Disconnect the electrical connectors.
  4. Remove the VIU from the bracket.
  5. The old VIU must be returned for core credit.
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