GM Service Manual Online
For 1990-2009 cars only

1/4 WINDOW INSERT WARPAGE INSERT P/N'S LISTED

MODELS AFFECTED: 1986 SOMERSET

NOTICE: This Bulletin supersedes 86-10-4 dated November, 1985, for addition of part numbers. Please discard original Bulletin and replace it with this one.

The quarter window insert can be removed and installed without replacing of the quarter window. The following procedure should be used for removal and installation of the insert.

Removal and Installation

1. Tape front edge of quarter module.

2. Using a flat-bladed tool, pry insert loose (see illustration).

3. Apply 1/8" bead of urethane on quarter window (see illustration).

4. Install insert (see illustration).

5. Remove tape.

Parts Information For Insert

20676756 Right Limited 20676757 Left Limited 20669606 Right Custom 20669607 Left Custom 20574322 Right T-Type 20574323 Left T-Type


Object Number: 86946  Size: MF


Object Number: 86582  Size: MF

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.