This a video showing how to replace the rear door glass on your own instead of going to a shop.
How to remove rear door glass on a chevy tracker.
By removing the motor if applicable and unbolting the regulator from the door it can be removed.
93 chevy 4x4 door removal.
Remove the door panel push pins and trim screws.
Remove the door handle bezel by inserting a flat trim removal tool between the door panel and handle bezel to release the locking tabs.
The glass will need to be removed from the tracks while it is in the lowered position by wiggling it out of the tracks.
Sorry for the video was bad but i made a quick one of how to do it since i could really find it myself so i had to do it on my own hopefully this helps someo.