Hood - Rear Edge Fluttering Condition

91chevy08

Number: 91-181-10


Section: 10


Date: February 1991


Corporate Bulletin No.: 061006


Subject: HOOD FLUTTER


Model and Year: 1989-91 S/T TRUCKS


The rear hood edge of some 1989-1991 S/T vehicle may exhibit a fluttering condition. A field repair has been tested and has proven effective in correcting this condition. This is done by means of hood bumpers (hood stops) which exert a pressure to the underside of the hood. This eliminates the freedom of motion that the hood is experiencing.

SERVICE PROCEDURE:

To repair this condition do the following:

1. Obtain two hood bumpers part # 458306.

Figure No. 1:

2. Measure 8-1/2 inches along lower cowl panel from the inboard side of the front fenders as shown in Figure 1 dimension "A".


3. Place bumper so that the middle of the bumper lines up with the inboard measurement.


4. Remove the old contact adhesive by sliding the hood stop against a smooth surface. Using 400 grit sand paper very lightly scuff the surface areas to be glued for maximum adhesion.


NOTE: If the placing of the hood stops under the hood causes the hood to rise to more than 1/8 of an inch above the cowl panel then, remove some of the rubber from the top of the bumper using a razor blade or sharp knife and continue until an acceptable height is achieved.

5. Use weatherstrip adhesive 12345097 to glue bumpers to vehicle.


PARTS INFORMATION


Part Number Description # per vehicle

458306 Bumper 1 for each side
12345097 Weatherstrip Adhesive

Part are currently available through GMSPO.


WARRANTY INFORMATION


For vehicles repaired under warranty use:

Labor Operation: T7600

Labor Time: 0.2 hr.

Trouble Code: 92


NOTE: Labor Operation is coded to base vehicle coverage in the warranty system.