Sierra Denali AWD V8-6.2L (2008)
Front Fender: All Technical Service Bulletins
Body - Buzz/Rattle From R/H Front Fender on Accel.
Bulletin No.: 07-08-59-003
Date: June 06, 2007
TECHNICAL
Subject:
Loud Buzz or Rattle Noise from Right Front Fender Area on Moderate to Hard Acceleration and/or Braking Torquing Around 1800-2000 RPMs or
Before 1-2 or 2-3 Shift (Install Closed Cell Foam to Right Front Fender)
Models:
2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT
2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon Denali XL, Yukon XL
Condition
Some customers may comment on a buzz or rattle noise from the right front fender area on moderate to hard acceleration and/or brake torquing around
1800-2000 RPMs or just before the 1-2 or 2-3 shift.
Cause
The radiator surge tank and/or the inner wheelhouse liner may be contacting the right fender.
Correction
Install closed cell foam to the right front fender using the steps below:
Verify the condition.
Open the hood.
Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in SI.
Remove the four bolts from the air cleaner adapter bracket.
Remove the air cleaner adapter bracket.
Remove the plastic retainer (1) from the right front center inner wheelhouse liner. Cut a piece of closed cell foam, P/N P46510, to 32 mm (1-1/4 in)
length.
Make a hole in the center of the foam with a 6 mm (1/4 in) drill bit by hand.
Install the piece of foam between the wheelhouse liner and the fender from inside the engine compartment at the removed retainer location.
Tip
Line up the hole in the foam with the hole in the fender and wheelhouse liner.
