| Subject: | Buzz or Rattle Noise from Rear Liftgate While Driving Over Rough Surfaces/Bumps (Install Foam Between Rear Wiper Motor and Liftgate) | 
| Models: | 2005-2007 Buick Terraza | 
| 2005-2007 Chevrolet Uplander | 
| 2005-2007 Pontiac Montana SV6 | 
| 2005-2007 Saturn Relay | 
| with Rear Window Wiper System (RPO C25) | 
Some customers may comment on a buzz or rattle noise coming from the rear of the vehicle or liftgate while driving over rough surfaces/bumps.
The cause may be from a lack of clearance between the rear wiper motor and the liftgate.
Install foam between the rear wiper motor and the rear liftgate using the steps below:
Important: Do Not completely remove the rear wiper assembly bolts.
Tighten
Tighten the rear wiper assembly bolts to 6 N·m (53 lb in).
Order Adhesive Back Shim Stock from Kent Automotive at 1-888-YES-KENT or online at www.kent-automotive.com.
Part Number  | Description  | Material Allowance  | 
|---|---|---|
P46510  | Adhesive Back Shim Stock (25 mm x 30 ft roll) [8 mm (5/16 in) thickness]  | 24 cents per vehicle (26 cents in Canada)  | 
For vehicles repaired under warranty, use:
Labor Operation  | Description  | Labor Time  | 
|---|---|---|
C9796*  | Install Foam Between Rear Wiper Motor and Liftgate  | 0.5 hr  | 
*This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide.  | ||