My daughter has a 96 gc. on xmas her rear just locked up. I hanked her into the closet parking lock. The rear locked and un locked. She got it towed to my house this after noon. do to rain i have not had a chance to look at it. They moved it in the yard some. It locked and unlocked a couple of time. It has disk breaks and is all time 4wd. Not saying it could not happen but have never heard of disk breaks locking so was thinking the ebreak set up. anyone else have any thoughts on what it could be?