Sticky Windows

Your killin' us with your piecemeal description of your troubles.

This is a brand new window - glass, frame, everything. There is no crank. The window is in three parts: upper part is stationary, front lower part is statonary, back lower part slides open and closed. Standard window on a Class A. I had the same setup on my gasser Class A.

GM

What vintage is your GM? I assume it's a manual hand crank set up. I would make sure the track on the bottom of the glass that the rollers ride on are cleaned of old grease and relubed with the proper lubricant. Usually a white lithium based grease. Same goes for all the pivot points of the crank assembly. If the problem only occurred after the new glass was installed, I'd say the vertical felt strips that guide the glass needs to be adjusted. Usually you access these adjustment points by removing the inner door panels.

Sounds like you need a new glass that's cut to the proper size...this time.

B.O.

Ya' coulda said so.

This window is new - replaced a few months ago. It has been difficult to open since installation

GM

I had the same problems as you when I lived in Navajo County, AZ. The dust storms would fill the felt window tracks with so much grit, the power windows were practically useless.
So, you must clean the side felts and also the felt wiper that is at the bottom of your windows. Wipe and wipe again with a water soaked rag.....after vacuuming out whatever grit you can. I wouldn't try using any type of lubricant on the felts because it will only attract more dirt.