I just changed the rear brake pads on my 2002 Silverado. I put the new pads on and new hardware (sliders and clip in caliper) & greased them, put everything together and pushed the brake pedal to make sure is all okay and both calipers seem to refuse to release the pads as they should. I could barley turn the rear wheels. Anyways, I went to take it for a test drive and it feels like the parking brake is on (it’s not and it’s not dragging). Drove about 2 miles & when I returned home both rotors were so hot they could not be touched. After about 15 min. to let the rotors cool down I took everything apart again, this time I left the sliders off to see if it would help; put everything back together, again and then applied the brake & still I cannot turn the rear wheels. Why would both rear calipers not release the pads from the rotors, do the calipers need replaced w/ every rear pad change? BTW, I have been changing disc and drum brakes for 30+ years and this the first time I have ever had this issue. Please off any suggestions. Thanks!