Interior - Rattle/Buzz From Rear Window Shelf
Bulletin No.: 03-08-110-004Date: August 06, 2003
TECHNICAL
Subject:
Vibration/Buzz/Rattle in Rear Window Shelf Trim Panel Area When Radio Volume/Bass Set High (Install Rear Window Panel Braces)
Models:
2003 Cadillac CTS
Condition
Some customers may comment on a vibration/buzz/rattle in the rear window shelf trim panel area whenever the radio volume or bass setting is on high.
Cause
This condition may be due to the energy output from the speaker causing the nearby panel components to vibrate/rattle whenever the radio volume or bass setting is on high.
Correction
Install a LH (1) and a RH (2) rear window panel brace assembly.
Repair Procedure
1. Remove the rear window shelf trim panel.
2. Remove the RH seat belt retractor.
3. Remove the rear speaker's two front retaining nuts (4).
4. Loosen the rear speaker's two rear retaining nuts (3).
5. Lift and support the forward edge of the rear speaker.
6. Ensure the braces are free of grease.
Important:
Once the brace has been positioned, do NOT pull away from the panel. If repositioning is necessary, slide the brace against the shelf panel.
7. Apply GM(R) Metal Patch Panel Adhesive Fast Set, P/N 12378566 (in Canada, use P/N 88901674), to the LH Rear Window Panel Brace, P/N 25760577, along the areas indicated in the illustration.
8. Quickly set in place the LH brace along the LH side of the rear speaker's attachment platform (6) and over the front rail of the shelf panel (5).
9. Apply even pressure along the entire brace. Ensure to maintain proper positioning of the brace.
10. Apply GM(R) Metal Patch Panel Adhesive Fast Set, P/N 12378566 (in Canada, use P/N 88901674), to the RH Rear Window Panel Brace, P/N 25760576, along the areas indicated in the illustration.
11. Quickly set in place the RH brace along the RH side of the rear speaker's attachment platform and over the front rail of the shelf panel (5).
12. Apply even pressure along the entire brace. Ensure to maintain proper positioning of the brace.
13. Install the rear speaker's front retaining nuts.
14. Tighten the rear speaker's rear retaining nuts.
15. Install the RH seat belt retractor
16. Install the rear window shelf trim panel.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use the table.
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