Brake Disc Caliper problems of the 2008 GMC Sierra 1500

2008 GMC Sierra 1500 sle has had to have front rotors and pads replaced at 20,000 miles. Replaced rotors and pads with aftermarket parts. At 30,000 miles pads and rotors are worn down to metal again. Dealership stated that calipers are working but rear brakes need to be replaced also. I have always had brake issues since the day I bought the truck brand new with brakes overheating.

09/2009 began to hear front brakes intermittently squeaking when I applied brakes. 10/2009 - took vehicle to midas for inspection. Technician discovered both front and rear brakes were worn down needed to be replaced, truck had approximately 19,000 miles paid for both front and rear brakes to be replaced. 2/2010 went to local mountains (big bear) for the day with my family. While coming down the mountain I noticed my brake pedal starting to get soft. Pulled over onto a turn our point and noticed my front drivers side wheel was smoking. Please my hands close to the wheel and felt heat coming from the brakes, did the same on the passengers side with the same results. Waited 30-40 minutes for them to cool down. Tested braking in the turn our and proceeded home. 2/2010 (the next day) took truck back to midas (with approximately 24,000 miles) for them to inspect. The technician noticed the disk were blue and recommend they be replaced. He also showed me the rubber boots that were melted on the drivers side due to the extreme heat that was generated. I requested that midas change the brakes (which they did) and purchased new rotors as the technician had advised and they also exchanged the brake fluid. I had planned on taking the truck to the dealer to have the drivers side caliper replaced. 2/2010 (the following weekend) I took the vehicle to foothill ranch Chevrolet and explained the events leading up to my visit. I explained to the service advisor that the drivers side caliper boots were burnt and I wanted them replaced. He noticed my concerns and took my vehicle. 2/2010 (the following Wednesday) received call truck was ready and picked up and that my caliper had not been replaced as it was found to be in acceptable working order even with burnt boots. 3/2010 called 800-222-1020 (gm customer line) incident # 71-814348680 to lodge a complaint and ask for my drivers side caliper to be replaced.