C 10 1/2 Ton Pickup 2WD L6-250 4.1L VIN D 2-bbl (1982)
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.
