WINDSHIELD UPPER CORNER CRACKS REPLACEMENT PROCEDURE OUTLINED

VEHICLES AFFECTED: 1985-87 CHEVROLET AND GMC 'M' VANS

Some 1985-1987 'M' vans may develop a crack in the windshield which originates from the upper right or left corners.

When this condition occurs or anytime windshield replacement is required, use the extended method as described in the appropriate service manual and move the upper right and left spacers outward to the farthest corner of the windshield frame as shown in Figure 1. Do not move the spacers into the curve of the windshield radius.

Relocation of these windshield spacers took place in production beginning with the following VIN breakpoints:

Chevrolet HB110535

GMC HB502594

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.