drivers side window movement

[4u2nv]

All of a sudden the drivers side window on my 87 k10 wants to slide back and forth , roll it down and it flops out of the felt and then to roll it back up you have to steer it into the felt , what makes it do this ???
Took the door panel off and looked but I don't know what I'm looking for , any help on this would be great.

[blazer2007]

Mine was the rear upright rail , it is tack welded to a support rail and the tack weld has broke. I,m sorta sure which rail ,but I do know one of the supporting rails has failed. Can take it apart and tack it again. To much slamming the door with bad felts and such I,m guessing

[4u2nv]

Originally Posted by blazer2007

Mine was the rear upright rail , it is tack welded to a support rail and the tack weld has broke. I,m sorta sure which rail ,but I do know one of the supporting rails has failed. Can take it apart and tack it again. To much slamming the door with bad felts and such I,m guessing

That I did see and all seemed good and firm , thanks though

[Pontiac1976]

Check you white roller bushing, that there in the tracks or not broken( REG.on the linkage) if the panel off roll up & down as you check the REG. to see if there is a miss hap it or other parts. If you have to check your good window see what different.

[TKCR]

I agree with Pontiac, it’s probably broken wheels. If it’s not that, it’s definitely something in there. Look also at you door sashes, make sure they are tight.