Rear Window Question

[Houses]

so I picked up a sliding rear window off craigslist. the guy said it was a factory window but I didn't notice the edge of the window where the gasket goes was flat. is this window even from our trucks? do you guys know which gasket will hold it in? the gasket from my solid window didn't work out. I know on other sliding windows they have the flat edge going around the whole window. what do you guys think?

[william-theglassman]

looks like a ford back glass to me. I have never seen a GM back glass that was flat all the way around . they all fit in a rubber gasket like the solid windows accept for the glue in ones and that is not a glue in glass.

[Houses]

I didn't think it would be from our trucks once I noticed that. haven't seen a ford window before but knew someone on here could help out. thanks for the fast reply.