Noise Heard in Radio Speakers (Replace Amplifier or Repair Wiring Harness)

This bulletin provides information on two different conditions.

Some customers may comment about intermittent static, popping, thumping or booming noises randomly heard in any or all speakers. This condition generally occurs in warmer climate areas.

Overheating of the radio amplifier due to ambient and operational temperatures may cause this condition.

An improved radio amplifier is now available from GMSPO. Replace the radio amplifier. Refer to the Entertainment sub-section of the Service Manual for the Amplifier Replacement procedure (SI2000 Document ID #717628).

Some customers may comment about consistent static, popping, thumping or booming noises heard in the same speaker repeatedly.

This condition may be caused by the radio amplifier wiring harness being pinched by the passenger side rear seat attachments, resulting in damage to the wires.

Repair any damaged wires using the procedure listed below.

1. Remove the right rear seat back. Refer to the Seats sub-section of the Service Manual for the Seat Back Replacement procedure (SI2000 Document ID #741140).
2. Remove the right rear door sill plate.
3. Pull back the carpet in order to access radio amplifier harness.



4. Inspect the harness at the pinched location (2) and repair any damaged wires. Refer to Wiring Repairs in the Wiring Systems sub-section of the Service Manual.
5. Verify proper installation of the harness clip (1) that attaches the harness to the body. Reinstall if necessary.
6. Install the carpet back into place.
7. Install the right rear door sill plate.
8. Install the right rear seat back. Refer to the Seats sub-section of the Service Manual for the Seat Back Replacement procedure (SI2000 Document ID #741140).

Parts are expected to be available from GMSPO October 15, 2001.

For vehicles repaired under warranty, use: