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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 >> Installation Procedure

Installation Procedure

  1. Record the 10-digit STID number from the label on the VIU module.
    2. Fig 1: Installing Screws
    GM661489Courtesy of GENERAL MOTORS CORP.
  2. Install the VIU to the bracket.
  3. Connect the electrical connectors.
    4. NOTE: Refer to FASTENER NOTICE .
  4. Install the screws (1) securing the VIU to the bracket.

    Tighten:  Tighten the screws to 9 N.m (80 lb in).

  5. Install the IP trim panel. Refer to TRIM PANEL REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER .
    6. IMPORTANT: After replacing the VIU, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair.
  6. Press and hold the white dot button until the OnStar® status LED turns from green to red, and back again to green.
  7. Install a scan tool. Use the ID information menu to access the new STID number.
  8. 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.
  9. Press the blue OnStar® button to connect to the OnStar® call center.
    1. Tell the advisor that this vehicle has received a new VIU.
    2. Ask the advisor to add the new STID to update the customer's account.
    3. Follow any additional instructions from the OnStar® advisor.
    4. Ask the advisor to activate the OnStar® personal calling feature, if available.
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