1999 ZR-2 Blazer. Sunroof was acting totally normal, no strange noises, opening and closing great. Suddenly, today I go to close it, hear this POP and now it it almost closed all the way but won't move hardly at all. When I hit the button to open it moves a hair slanting up then jams. Go to close it it moves a little bit then jams.

I see 4 star screws on the sides of it, do these hold the glass part on? Is there an exploded diagram someplace that I can see what I have to do here? There's a slight gap on the driver's side I'll bet is gonna leak like hell......I may just have to caulk and seal the whole thing shut.

Can anybody advise me on this? Thanks!!!!

 

It sounds mechanical. I don't know much about how they are installed but It could have popped off track perhaps.

 

The one in my custom express van has a gear that moves springs that move the window in the track. was able to pull the motor to get the window to move and close. used a small wedge to hold window closed with no leaks. all because of a stripped gear due to lack of lubrication in the spring track. Good luck.