1991 Chevrolet Silverado • 13,000 miles

Front drivers side brake seems to be dragging. Gets worse the more you drive and wheel gets pretty hot. After letting off brake pedal to go you can feel it "sticking" for a few seconds. Also right rear keeps having air bubbles after hours of bleeding. Within the last few days we have replaced the booster, master cylinder, calipers, pads, shoes, and wheel cylinders. Brakes work and has a good pedal but what could be causing this?
January 17, 2013.

If you replaced the caliper and it still sticks, I would say that the rubber hose to the brake caliper needs replaced. They deteriorate inside and when you hit the brakes, fluid goes one way, but can't return. Thus, the brake sticks. Check that and let me know what you find.