C 30 1 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1983)
Window Seal: All Technical Service Bulletins
Interior - Whistling Sound Around Opera Window
Number:
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