I am looking for some help on my 1994 K1500 Chevy 2-door Blazer. The issue that I am experiencing is the rear glass when closed does not seem to be flush with the tailgate. When the glass is closed, it is noticeable that it is not all the way closed and flush with the tailgate. I experience leaking in the truck during heavy storms and I have reason to believe that this is due to the fact that the glass is not fully closed onto the tailgate. If anyone has had similar issues or may know of any solution, I would greatly appreciate the help, as this issue has been going on for about four years. Thanks. I can post pictures to if that helps with the explanation.

 

Have you tried spraying some WD-40 on it? I had a similar issue with the doors on my Jimmy. The latches just go so gunked up that it wouldn't let my doors close and another wouldn't open. But the WD-40 cleaned it out and they were able to latch and open cleanly.