Headlining Trim Panel Appears Cut Too Short (Relocate OnStar/Radio Wire Harness and Antenna Connector)

Some customers may comment on the headliner substrate appearing to be cut too short at the headliner edge towards the rear of the vehicle.

The picture above shows the current location of the two connectors that is interfering with the energy absorbing foam.

This may be caused by interference of the OnStar®/Radio wire harness and antenna connector being routed where the energy absorbing foam is located at the rear header.

Technicians are to relocate the OnStar®/Radio wire harness and antenna connector away from the energy absorbing foam using the procedure below.

Important: : DO NOT replace the headlining trim panel.

Important: You do not have to drop the whole headliner to do this procedure.

1. Lower the rear of the headliner as needed- enough to access the OnStar®/Radio wire harness and antenna connector. Refer to published procedures in SI and use appropriate steps to lower the headliner.
2. Remove the Radio antenna connector retaining clip from the body (white connector) and the wire harness retaining clip- cut off the retaining clip end.
3. Trace the wire harness down along the rear corner pillar.



4. Disconnect the two wire harness retaining clips (see figure above).
5. Slide the harness up about 101 to 127 mm (4 to 5 in). Clip the harness retaining clips back to the body in the rear corner pillar.



6. Wrap some foam tape around the radio antenna connector (1) as shown in the picture above.
7. Using a tie strap, secure one part of the harness to the body (2) as shown in the picture above.
8. Secure the other part of the harness to the existing harness that runs along the roof line with a tie strap (3).
9. Reinstall the headliner.

For vehicles repaired under warranty, use: