Poor Radio Reception (Check Antenna Lead and Grounds)

Some customers may comment that the radio has poor reception. This condition is more apparent on the AM band.

This condition may be due to any one of the following causes:

To assist in diagnosis, the following steps are provided:

1. Verify that the antenna lead at the back glass is fully seated.
2. Check the antenna module ground for effectiveness.

2.1.	Lower the rear of the headliner.

2.2.	Remove the antenna module ground bolt and reinstall.

Tighten
Tighten the bolt to 3N·m(27 lb in).

2.3.	Install the headliner.

3. Check the radio ground(s) for effectiveness.

3.1.	Remove the driver side knee bolster.

3.2.	Locate the radio grounds G200 and G202 (Grand Prix, Allure/LaCrosse) or ground G202 (Impala, Monte Carlo) to the right of the steering column.

3.3.

Verify that the ground(s) are tight. The wire eyelet should not move. If the ground appears to be loose, attempt to retighten. If you are unable to tighten the bolt more, remove the bolt and check for metal shavings in the bolt hole. This bolt is self-tapping and when it was originally installed at the plant, metal shaving may have built up inside the hole, preventing the bolt from being fully tightened.

3.4.	Install the driver side knee bolster.

For vehicles repaired under warranty, use: