For 1990-2009 cars

### Removal Procedure

1. Remove the OnStar® vehicle communication interface module (VCIM). Refer to Communication Interface Module Replacement .
2. Remove the nuts (1) retaining the navigation control processor bracket to the instrument panel (I/P) structure.
3. Remove the bracket from the vehicle.

### Installation Procedure

1. Install the bracket to the I/P structure.

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.

2. Install the nuts (1) retaining the bracket to I/P structure.

Tighten
Tighten the fasteners to 9 N·m (80 lb in).

3. Install the VCIM. Refer to Communication Interface Module Replacement .