Side Windows

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There are several versions of side windows in the GMC.

Later windows were made by Hehr, an RV window company that continues in business today. Latches may be sourced as a current Hehr product, no. H695.

Glass was PPG Sunshade Herculite, in a 50 percent transmissivity. A 35% ceramic film will result in a total transmissivity of 17.5%. Rejection of the sun's heat can be improved by using a ceramic film; these perform best for blocking heat-producing UV rays.

There are two kinds of glides that are installed in the window extrusion to provide a seal around the glass: flocked rubber and hard plastic. The hard plastic is becoming hard to source; owners have successfully replaced the hard plastic with flocked rubber.