GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1529444  Size: SH
  1. Remove the communication interface module. Refer to Communication Interface Module Replacement .
  2. Disconnect the vehicle interface unit module electrical connector (1).
  3. Remove the vehicle interface unit module retaining nut (2), then the module.

Installation Procedure


    Object Number: 1529444  Size: SH
  1. Position the vehicle interface unit module.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install interface unit module retaining nut (2).
  4. Tighten
    Tighten the power control module bolts to 7 N·m (62 lb in).

  5. Connect the vehicle interface unit module electrical connector (1).
  6. Install the communication interface module. Refer to Communication Interface Module Replacement .