For 1990-2009 cars

# RIVETED DOOR GLASS CHANNEL REPLACEMENT PROCEDURE

#### VEHICLES AFFECTED: All 1986 'N' Styles Built After October 1985

All 1986 'N' styles built after October 1985 have a rivet retained door glass sash channel. Prior 1986 'N' styles have the adhesive retained 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 5 of the 1986 Body Service Manual.

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

#### REMOVAL (Figure 1)

#### CAUTION:

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

1. Remove the door glass as specified in Section 5 of the 1986 Body Service Manual.

2. Place door glass on a protective surface.

3. Drill out rivets (item 4) using a 4.8mm (3/16 in.) drill bit taking care not to enlarge hole in sash channel. If sash channel hole is enlarged during drilling operation a new sash channel 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 3/16 in. x .527 in. aluminum domehead blind rivets.

4. Install door glass as specified in Section 5 of the 1986 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.