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.

Caution: Refer to Fastener Caution in the Preface section.

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.