Interior - Whistling Sound Around Opera Window
89chevy33Number: 89-275-10
Section: 10
Date: November 1989
Corporate Bulletin No.: 961003
Subject: REAR DOOR OPERA WINDOW WHISTLE/WIND NOISE
Model and Year: 1977-86 C, K TRUCKS 1987-89 R, V TRUCKS
Figure 1:
Figure 2:
TO: ALL CHEVROLET DEALERS
Some 1977-1986 C, K and 1987-1989 R, V Suburbans may experience a whistling sound around the stationary glass (opera window) in the rear side doors. This condition may be corrected by replacing the rubber seal surrounding the stationary window identified in Figure 1. If the whistling condition is found to occur, the rubber seal should be replaced with revised rubber seal (PN 15646933). The difference between the two seals can be identified in Figure 2. The cross section shows that the revised seal has a much larger lip which will decrease the overall level of wind noise.
Vehicles built after the following VIN Breakpoint have the new seal installed.
KF195886
Parts are currently available from GMSPO.