[GMC Guy]

well i know for a fact that the rears are getting good pressure, i had to drive the truck clear across town to get to the shop. and before i got a feel for the pedal, i could lock the brakes up with too much pedal. plus when the rear was set up on jack stands and the brakes assembled, i started the truck and put it in gear just to check the operation of the rear brakes. everything functioned beautifully and the rotors stopped spinning without a whole lot of pedal. so basically i know the truck will stop fine, i just can't keep a hard pedal with the truck running....