Rear window coming loose - How do I repair it?
 

1995 GMC Sierra. The rear window (non-slider) is loose at the bottom-center. You can tap it and see that it is loose from the cab. The rest of the window appears sealed good.

I do not see any attachment or sealing items such as trim, etc. It appears to be just set in place and obviously held be a sealing glue. Is this correct?

Is the process to just get the proper glue (what kind?) and squirt it in between the glass and the metal of the window opening or what?

Bump?

If you have to use glue, get the GOOP from home depot. It works wonders for automotive.