help 03 z71 will not stop eating brake pads

Blackout

Dat Rust Bucket
Dec 18, 2015
121
11
0
West Michigan
Have replaced EVERYTHING on this damn trucks rear brake system. Calipers including pins and slides, pads, rotors, I even replaced the brackets thinking they could be bent. Both inner pads go out at the same time within 15k. Ive got almost $1000 into it and still having the same problem. What in the fuck is going on here?
 
$1000? What kind of pads and rotors do you have? What's going wrong when they fail?
 
Powerstop and on my 3rd set of pads, also replaced brake lines. Let the shop do that though shit was nasty was about $300. It wears them down to bare metal in about 15k. I replaced the front pads at the same time as the first set on the rear and they're still at 75% atleast. I'm not heavy on the brakes either.