V 30 P/U 4WD V8-350 5.7L (1987)
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,