GM Service Manual Online
For 1990-2009 cars only

Buzz or Rattle Noise from Rear Liftgate While Driving Over Rough Surfaces/Bumps (Install Foam Between Rear Wiper Motor and Liftgate)

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)



Condition

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.

Cause

The cause may be from a lack of clearance between the rear wiper motor and the liftgate.

Correction

Install foam between the rear wiper motor and the rear liftgate using the steps below:

  1. Verify that the noise is coming from the rear liftgate.
  2. Remove the rear liftgate trim panel. Refer to Liftgate Trim Panel Replacement in SI.
  3. Cut a piece of closed cell foam, P/N P46510, to 25 mm (1 in) width by 30 mm (1 1/8 in) length.
  4. Loosen the two rear wiper assembly bolts.
  5. Important: Do Not completely remove the rear wiper assembly bolts.


    Object Number: 1990807  Size: SH
  6. Slightly pull down on the rear wiper motor to locate the witness mark (1) on the liftgate.

  7. Object Number: 1990809  Size: SH
  8. Attach the piece of foam to the witness mark on the liftgate as shown above.
  9. Tighten the rear wiper assembly bolts.
  10. Tighten
    Tighten the rear wiper assembly bolts to 6 N·m (53 lb in).

  11. Install the rear liftgate trim panel. Refer to Liftgate Trim Panel Replacement in SI.
  12. Verify that the noise is gone.

Parts Information

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)

Warranty Information

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 This number will not be published in the Labor Time Guide.