General Windnoise Diagnostic Guide

For vehicles built prior to October 7, 2005:

Windnoise from around the outside rear view mirror.

The mirror gasket may not be making enough compression to the sheet metal and allowing noise to come in through the trim panel extension cover.

Gently pull at the top end of the trim panel extension cover to disengage the attaching clip.

Install the insulator behind the extension cover. Refer to the illustration above.

Wind noise coming from the window seal (front and rear doors).

The door glass seal contact with the glass may be light.

Correction for vehicles built prior to VIN breakpoints 66032861 (for Chevrolet) and 66038652 (for Pontiac):

1. Remove the door glass seal from all the doors. Refer to the illustration above.



2. Check the gap between the glass and the metal flange. The gap should be 10 to 12 mm (3/8 in) for good contact pressure of the seal to the glass. Refer to the illustration above. If the gap is greater than 12 mm (1/2 in), refer to the next step.
3. To protect the sheet metal finish, use duck bill pliers and bend the flange slightly to achieve 10 to 12 mm (1/2 in).

Correction for vehicles built AFTER VIN breakpoints 66032861 (for Chevrolet) and 66038652 (for Pontiac) without secondary seal two lip design:

-- Replace all the window seals. Refer to the illustration above.

Wind noise coming from the roof rack area.

1. The position of the front crossmember needs to be aligned to the plastic cover as shown in the illustration above.



2. The position of the rear (second) crossmember needs to be at the far rear position of the roof racks bar. Refer to the illustration above.



3. Make sure that all tabs are in "lock" position and the arrow (shown in red) in both bars is pointing forward. Refer to the illustration above.

1. The position of the front crossmember needs to be aligned to the second slot of the roof rack (front to back). The position of the rear (second) crossmember needs to be at the last position (slot) of the roof racks bar as shown in the illustration above.



2. Make sure that all tabs are in "lock" position and the arrow in both bars is pointing forward. Refer to the illustration above.

For vehicles built prior to VIN breakpoints 66053314 (for Chevrolet) and 66051985 (for Pontiac):

Wind noise coming from the B pillar area in the front doors.

The B pillar appliqué has a gap to the door. Refer to the illustration above.

Replace the B pillar appliqué on the front & rear doors.

For vehicles built prior to VIN breakpoints 66079786 (for Chevrolet) and 66077742 (for Pontiac):

Wind noise coming from the C pillar area in the rear doors.

The C pillar trim has a gap to the door. Refer to the illustration above.

Replace the C pillar trim.

The appliqué inner is separating from the rest of the appliqué.

The appliqué inner is separating from the rest of the appliqué. Refer to the illustration above.

Remove the "A" pillar molding .

1. Remove all the screws.
2. Pull outboard on the molding at the top rear to disengage.
3. Push the plastic extension back in place and hot melt the extension from the back side to secure.
4. Reinstall the molding.