Body Interior - Wind Noise Into the Cab Area
90chevy03Number: 90-130-10
Section: 10
Date: January 1990 Corporate Bulletin No.: 961004
Subject: FRONT C/V WINDOW WINDNOISE
Model and Year: 1987-90 R/V TRUCKS
TO: ALL CHEVROLET DEALERS
Wind noise into the cab area, in the area of the C/V window, may be experienced in some 1987-1990 R/V models. If this condition occurs, a redesigned ventilator assembly is now available. The part numbers are listed below:
Left assembly wfth clear glass (P/N 15634471)
Right assembly wfth clear glass (P/N 15634472)
Left assembly wfth tint glass (P/N 15634473)
Right assembly wfth tint glass (P/N 15634474)
Parts are currendy available from GMSPO.
1990 R/V vehicles built after the following VIN breakpoints have the new ventilator assembly installed:
Flint Chevrolet LF119088
Figure No. 1:
The relevant change on the new C/V assembly was to the vent seal which now incorporates a double lip design. This difference is shown in Figure 1, and a brief description is listed below.
Installation
The installation instructions called out in the appropriate light duty service manual remain the same with the exception of the following:
The inner lips "A" (Figure 1) are to lay inside the sheet metal while outer lips "B" (Figure 1) are to lay outside over the sheet metal. Additionally, after the assembly is installed and adjusted, look for a gap between the run channel (the vertical support of the vent window) and the outer weatherstrip, which is located at the base of the main window. If a gap exists,
Figure No. 2:
slide the outer weather strip forward until it contacts the run channel in order to seal the gap. See Figure # 2.
IMPORTANT: If the vehicle experiencing wind noise is a Suburban, Dealer Service Bulletin Number 89-275-10 on "Opera" windnoise should be referenced.
For vehicles repaired under warranty use:
Labor Operation Number: C0080 (Right) C0081 (Left)
Labor Time: 0.6 Hrs. (each)