Arriving home Monday evening from work and getting out of truck, i noticed a strong burning brake smell along with some smoke. Passenger side rear. Wheel was very hot. Like you drove with the PB on. Had time to check it today at a local shop in walking distance. In short, one of the pistons cracked in the caliper. Took out the caliper, pads and rotor. All replaced. Getting it back shortly. Figure way cheaper than a dealer. Can"t complain. First major repair in almost 4 years.