Firebird V8-5.7L VIN G (2001)
Front Door Panel: All Technical Service Bulletins
Speakers - Buzz/Rattle Sound
File In Section: 08 - Body and Accessories
Bulletin No.: 02-08-44-003
Date: March, 2002
TECHNICAL
Subject:
Buzz or Rattle Sound from Speaker Locations
(Add Foam Tape to Speaker Grilles or Door Panels)
Models:
1997-2002 Chevrolet Camaro
1997-2002 Pontiac Firebird
with Monsoon Audio System
Condition
Some owners may comment on a buzz or rattle sound from the door panel or rear quarter panel trim speaker locations. Customers may also perceive this
noise as distortion when the audio system is reproducing low bass.
Important:
Vehicles built after June, 1999 were factory-equipped with the additional insulating materials called out in the Correction section of this bulletin. The
2000-02 model years are called out in this service bulletin because service parts sold for these vehicles do not have the additional sound insulating
materials applied. If the vehicle in question has had door, door trim panel, rear quarter trim panel or rear quarter trim panel speaker grille
replacement, this bulletin may apply.
Cause
In some vehicles, the rear quarter trim panel speaker grilles may not be retained with sufficient tension. When low bass tones are reproduced, the grilles
may rattle against the rear quarter trim panel. In addition, low bass reproduction may cause the door panel to vibrate against the door structure causing a
buzzing sound.
Correction
Diagnose the location or locations the buzz/rattle is coming from using the procedure listed, then apply foam or flocked tape as instructed.
Important:
Verify that the recording used to test the system is a "clean" recording. Some music contains passages that are intentionally recorded with distortion
for effect (especially in the bass region). This type of recording is not an acceptable test source.
1.
Insert and play a CD or cassette. If available, use the customer's recording so you can identify what the exact customer concern is.
2.
Listen to the suggested track/song at a loud or high volume (but never at maximum volume).
3.
While the track/song is playing, touch and apply pressure to the door panel lower edges on each door. Next, apply pressure to the rear quarter
panel speaker grilles. If the rattle or vibration stops when pressure is applied to one of these areas, you have located the source. Be sure to check
all locations as more than one source is possible.
4.
If either location is identified as the source, refer to the proper procedure below for correction. If a front speaker is the source, you will be
instructed to correct both door panels. Likewise, if a rear quarter panel speaker is the source, you will insulate both rear quarter trim speaker
grilles.
5.
If the source could not be located you may have another cause not covered in this bulletin, such as other loose trim, a loose speaker or a damaged
speaker. Refer to the Entertainment sub-section in the Service Manual for additional diagnostic information.
Front Door Panel Noise Correction
The following procedure is identical for the left and the right door. Use this procedure for the driver's side and then repeat on the passenger side.
1.
Remove the door panel accessory control switch by prying out of the door handle. Disconnect the electrical connector.
