Wet Road Sizzle Noise from Rear of Vehicle (Install Wheelhouse Liners)

Some customers may comment that road noise can be heard from the rear of the vehicle primarily on wet road surfaces.

This condition may be caused by noise that is transmitted into the passenger compartment from the rear wheelhouse area.

Install a liner in both rear wheelhouse openings following the procedure below:

1. Raise the vehicle on a suitable hoist. Refer to Lifting and Jacking the Vehicle in General Information (SI2000 Document ID #760089).
2. Remove both rear tire and wheel assemblies.
3. On Pontiac vehicles, remove the screw from the rocker panel at the front of the wheelhouse opening. The wheelhouse liner fits between the rocker panel and the quarter panel sheet metal at this location. This screw is not present on Chevrolet vehicles.

Right Side Shown, Left Side Typical




4. Hold the wheelhouse liner (1) in place and drill four 3/32 in holes through the dimples (3) in the wheelhouse liner and through the quarter panel sheet metal. On Pontiac vehicles, only three holes are required since the rocker molding screw (2) will be reused.
5. Coat the newly drilled holes with anti-corrosion compound.
6. On Chevrolet vehicles, install the wheelhouse liner using four new screws, P/N 10122060. On Pontiac vehicles, install the wheelhouse liner using three new screws and the original rocker panel screw removed earlier. Please note that the screws are sold in packages of 10.
7. Repeat the installation procedure for the opposite side.
8. Install both tire and wheel assemblies.

Tighten
Tighten the lug nuts to 140 N·m (100 lb ft).

9. Lower the vehicle.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: