Windows - Popping Noise When DOWN or Road Noise When UP

89chevy15

Number: 89-131-10

Section: 10

Date: APRIL, 1989

Subject: BINDING OR POPPING NOISE OR ROAD NOISE CAUSED BY INNER DOOR GLASS BELT SEAL


Model and Year: 1988-89 "L" CAR




TO: ALL CHEVROLET DEALERS


Condition: Some customers may comment about a binding or popping noise on 1988-89 L-car front door glass when the glass is initially rolled down, or road noise caused by a gap between the front door glass and inner belt sealing strip with the glass in full up position.

Cause: The conditions may be caused by a misadjusted regulator arm stabilizer plate.

Correction: The stabilizer may be adjusted inboard or outboard by bending with locking pliers. It may be considered to be adjusted properly when:

1. There is enough inboard pressure to prevent glass moving outboard, creating gaps of inner belt strip to glass, BUT;

2. Not so much inboard pressure to increase binding of the regulator arm to the stabilizer.

3. After necessary adjustment has been completed, lightly coat the outboard surface of the regulator arm and the inboard surface of the stabilizer arm where they come in contact with lubriplate GM P/N 1052196 or equivalent.

Parts are currently available from GMSPO.
Labor Operation Number: Right - C0100 Left - C0101
Labor Time: .5 Hours