Brakes wearing uneven
 

During an oil change I noticed the rear passenger brake pads are warn down alot more than the other three wheels. My concern is that brakes are dragging. I'm getting about 16-16.5 miles per gallon. Has anyone seen this before? All pads have about 30,000 miles on them. Rotors and pads were replaced during brake job. I got 53,000 miles out of OEM brakes.
Thanks for your help!

If it matters truck is 2006 RR.

When you say "rear passenger brake pads" and then "more than the other three wheels" are you implying that one side on the rear are worn more than the other? Or, are the rear pads wearing more than the front? If that is the case, that is somewhat normal, usually the front pads wear faster though...

You most likely have a caliper sticking.

Thanks Mike. There is diff something wrong! Rear passenger pad has lets say 2mm, and all 3 others pads have 4mm.

It's either the caliper itself or the pins on the caliper carrier (mount) have seized up. I'm dealing with that on mine right now. I couldn't even get two of the pins out so I am now in search of two used carrier brackets.