For 1990-2009 cars

# MECHANICAL ATTACHMENT OF DOOR GLASS SASH CHANNEL REVISION

#### VEHICLES AFFECTED: ALL 1987 OLDS AND BUICK 'C/H' and Cadillac 'C' MODELS BUILT AFTER THE FOLLOWING VINS: MODEL VIN OLDS 88 H1820335, HW350351, HH310038 OLDS 98 H1316375 AND H4338697 BUICK LESABRE HH480000 BUICK ELECTRA/PARK AVENUE H1435882 CADILLAC DEVILLE AND FLEETWOOD H4293404

All 1987 Olds and Buick 'C/H' and Cadillac 'C' models built after above VIN numbers have a rivet retained door glass sash channel. The subject door glasses should be serviced using the factory installed method. To replace an adhesive retained sash channel or door glass, refer to Section 5C of the 1987 Body Service Manual.

The procedure to replace a rivet retained sash channel is as follows:

REMOVAL (SEE ILLUSTRATION)

#### CAUTION:

Safety glasses and work gloves should be worn to reduce the chance of personel injury, should the glass break.

1. Remove the door glass as specified in Section 5 of the 1987 Body Service Manual.

2. Place the door glass on a protective surface.

3. Drill out rivets (Item 4) using a 4.8mm (3/16") drill bit, taking care not to enlarge hole in sash channel. If sash channel is enlarged during drilling operation, a new sash must be used.

4. Remove sash (3) and spacer (2).

INSTALLATION

1. Locate spacer (2) to door glass and sash channel (3) to spacer and glass.

2. Align holes in door glass, spacer and sash channel.

3. Connect sash and spacer to glass using a new type expandable rivet available through GM Service Parts, Part Number 20743322.

4. Install door glass as specified in Section 5 of the 1987 Body Service Manual.

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.