Originally Posted by BCam
I have an E350 window van with a large, driver side pop-out window. I was wondering how far open it would go if the latches didn't constrain it.
It seems like a mod waiting to happen.
That sort of modification would lead to sure breakage of the glass. As said those shown on GM vans were metal or fiberglass panels designed to deal with wind loading that will try to lift them and be able to withstand slight rough handling or abuse.
The GM versions have true rather heavy duty albeit small footprint hinges intended to swing just under a full 90* upward movement.
BTW IIRC that GM option was under $3K over the cost of the base vehicle, exclusive of any other options added during manufacture.