Chevy window trackwhy does the window go up crooked 1994 c0rsica

When you take the card ( cover ) off door, you
should see a runner for a wheel which pushes window
up.The glass sits in a grove on one of these runners,
and may either have come out on one side,or one end
could be broken off.Most times it will be welded on,but
l have on occasion managed to self tap a screw into the
upright runner.It could be the upright that has broken
away from door at some point.It can be self tapped if you are
careful,at the bottom from the inner door side.
I have also seen it where a piece of wood was wedged
at the bottom of the inside,between upright and end of door.
You must get cover off first to find out.
LUCK