either way, chances are excellent you'll need to remove the door panel to fix it. If you do, check the regulator for binding. I had this problem recently on my SD. I took the regulator and motor out together. Regulator looked fine. I then removed and disassembled the motor (it only took about 3 minutes). The lower bushing was rusty and nasty. I brushed it out, lubed it with lightweight oil and reassembled. Now, it works better now than it did 9 years ago.
