I am a little confused on what you are working with. You are trying to replace the swing out extended cab window? This should have a latch and two hinges?
This is a silverado right? Here is the instructions for a Silverado. Take a look!
Tighten Tighten the bolts to 10 N·m (89 lb in).
You have a good one here. Gm has apparently redesigned that hinge due to a wind noise. The bad thing is they don't have any instructions on how to put the old style together. They have revised their instructions to work with the new style hinge. I have never had one of those apart, so I am in the dark here. Here is the info on the redesigned window. I know its not going to help you, but atleast you can see what I am looking at! Wish I could be of more help. The instructions are the ones I already posted, but here it all is anyway!
This bulletin is being issued to revise the Hinged Body Side Window Replacement procedure in the Stationary Glass sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
Hinged Body Side Window Replacement
Notice: Refer to Fastener Notice.