WIND NOISE AT SIDE MARKER LAMP APPLY SEALER TO OUTER EDGE

Subject: WIND NOISE AT SIDE MARKER LAMPS

Model and Year: 1990-92 S/T TRUCKS WITHOUT SPORT GRILLES

Owners of some 1990-1992 S/T vehicles may comment on a wind whistle through the grille in the area of the side marker lamp(s). This condition may occur as air flows through the side marker lamp bracket(s). The whistling sound is intermittent and is affected by vehicle speed/direction and wind velocity/direction. To correct this condition, it is necessary to apply sealer along the entire leading edge of the side marker lamp(s). This eliminates the air flow through the mating surfaces of the lamp bracket(s) and the grille.

SERVICE PROCEDURE:

1. Remove the grille.

A. Remove the four grille to radiator support fasteners located across the top of the grille and the four fasteners located within the egg crate area of the grille.

B. Locate the two grille to fender fasteners at the bottom of the grille (one on each side). These can be either Christmas Tree style retainers or bolts:

a. If the grille has Christmas Tree style retainers, it is NOT necessary to remove them.

b. If the grille has two grille to fender bolts, remove them.

C. Disconnect the side marker lamp connectors.

2. From the back side of the grille, apply clear G.M.S. sealer (P/N 1052915 or equivalent), along the entire leading edge of the side marker lamp(s) (Figure 1, View A).

3. Reinstall the grille.

A. If the grille is equipped with Christmas Tree style retainers, one on each side of grille, snap the grille in place prior to torquing the remaining fasteners. If required, replace the Christmas Tree style retainers (P/N 15672328).

B. If the grille is equipped with two grille to fender bolts located at the bottom of the grille, one on each side, instead of Christmas Tree style retainers, reinstall the bolts and torque them to 1.6 - 2.2 N.m. (13 - 18 lbs. in.).

C. Torque the remaining eight fasteners located across the top of the grille and within the egg crate area to 1.2 - 1.6 N. m. (10 - 13 lbs. in.).

SERVICE PARTS INFORMATION

Part Number Description Qty/Veh ----------- ----------- ------- 1052915 G.M.S. Sealer-Type A As Required 15672328 Retainer-Radiator Grille As Required

Parts are currently available from GMSPO.

WARRANTY INFORMATION

For vehicles repaired under warranty use:

Labor Operation: B1308 Use applicable labor time guide for labor hours.

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.