FLUTTERING CONDITION REAR HOOD EDGE. GMC Truck S15 Pickup - 4WD 1990

For 1990-2009 cars

# FLUTTERING CONDITION REAR HOOD EDGE

#### SUBJECT: HOOD FLUTTER (RUBBER BUMPER STOPS) ----------------------------------

#### VEHICLES AFFECTED: 1989-91 S/T VEHICLES --------------------

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.

2. Measure 21.5 cm (8-1/2') 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

Use the most applicable Labour Operation and Time from the Canadian Labour Time Guide.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.