I have a gmc safari van in my car lineup and I use it for moving junk and long trips. I noticed lately that once in awhile I can only raise/lower the drivers side window a inch at a time. It will go down all the way once normally and then up a inch at a time I wait 20seconds and it will go up a inch and stop again. I cant figure this out the pass. side window works fine. Sorry for posting a non related topic but I refuse to join a astro/safari forum. Thanks for any help guys.

Most likely this is a bad connection at the plug on the driver master switch. Try removing it and cleaning the connections.

The thing is this stupid thing only went up a inch every 10 minutes today during the afternoon heat. I moved it tonight and the window worked like new. I have a feeling its based on the temp. do you think it points more to the window motor or a relay? I couldnt find a power window relay anywhere.

i believe their on a high power fuse. but its probably just the motor. mine does the same thing, winter, fine, summer, slow.

Ok...that'* a big help.

Typically that behavior is common with a bad power motor or regulator on many cars.