Quote:
Originally Posted by DeadheadNM
The glass is the same but I suspect the openings have slight differences (3/8"?) in size. GM did make separate gaskets and this set of installation instructions for a NOS slider window I found indicates that one of the two styles needs the opening enlarged, which suggests that the sizes do differ. As shown, one gasket style is offset from the other relative to the wall. I'd like to know if I need to plan for enlarging the opening to do a slider install beforehand (in my case into a single wall top). The diagram illustrates the differing gasket configurations and glass relation with regard to the wall of the top(s).
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I have had both gaskets. The aftermarket gaskets I have seen are all the "S" type gaskets, although you can still get the "H" type, as it's used in heavy equipment.