I have a 2013 GMC Sierra 1500 5.3l v8 slt x cab with the suicide doors and 4x4 (the 6foot bed model). it has front disk and rear drums.  The driver side bearing popped so i replaced it. found the caliper was also frozen with rust so i replaced that too. After that got a message in the OBS scanner showing the rear speed sensor was bad so i replaced both of them.  Now i when i start the car, moments later when i hit the breaks i get a studder the first time, then a sudden stop the second time with the ABS, traction control and stabilitrak lights all on. if i pull the ABS fuse out, the car runs and stops normally.  Thought it was maybe the ABS module but not sure.  not a whole lot of mechanics want to touch this thing.  love the truck so would prefer to fix this. Truck has 130k miles.

thanks for any input.

A little more information... this is an automatic. The breaks are not spongy at all, and engage at a normal height. this thing stops good and the downhill stopping system does engage when going downhill. Don't think its a hydraulic issue and when i tested the harnesses there was proper voltage on the sensors for all 4 tires. it does need new tires, i am running maypops.