A/C - Hissing Noise in Instrument Panel

Bulletin Number: 93-10-8
Reference Number: 200105
Publish Date: 11/92

Subject:
NOISE FROM IN CAR SENSOR ASPIRATOR (INSTALL MUFFLER)

Models Affected:
1992-93 BONNEVILLE MODELS

Some 1992-93 Bonneville models with C68 may experience a hissing or air rush noise from the in car sensor opening in the instrument panel. The noise is generated by the aspirator for the in car sensor.

CORRECTION:

The noise can be greatly reduced by installing a muffler in the aspirator hose.

1. Check for proper operation of the in car sensor aspirator and repair if required.
2. Remove the trim plate for the radio and HVAC control head.
3. Remove the radio. The aspirator hose should now be accessible.
4. Cut the hose where it is accessible, and install aspirator muffler P/N 1649040. The muffler is not directional. Be sure the hose is over the attachment barbs on the muffler.
5. Reinstall the radio.
6. Reinstall the trim plate.
7. Recheck the in car sensor aspirator for proper operation.

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation No.: T5313
Labor Time: 0.3 hr.