I have a 1989 chevy k1500. Seem to be having issues with drum brakes seizing up on me. A month ago, I was pulling out of a drive through and noticed how sluggish the truck was acting. I pulled into a parking lot and came to a stop. The truck would not budge. After 2 hours, I went back, put the truck in reverse and voila, it was like nothing happened at all. I went to see a mechanic and he looked everything over and said it all looked good. He said sometimes they lock up (for whatever reason) and that reversing will self adjust the drums.
Tonight, I'm leaving the arena, I go over a speed bump, and all of a sudden, stupid wheel is seized again!! Any ideas out there as to why this is occuring??