New booster, master cyl, ABS pump, wheel cyl's, front calibers, rotors, drums, pads, shoes, lines, wheel sensors. The proporsining valve checks out.
That hard pedal is a sign of a vacuum leak on the brake booster.Check the vacuum hose on the booster for holes and with the engine running have someone push the brake pedal while someone else watches the hose to see if it is collapsing when the brake is applied.If it does that will be your problem.Replace the 3/8 vacuum booster hose.It will have to be the thick hose just for a vacuum booster or it will do the same thing if that is what is wrong.
SOURCE: When engine is turned on,
if brake are only staying on with key on it would have to be in turn signal switchsomehow feeding thru since t/s work off of ignition power and brake lights are powered all the time. check and see iof your turn flasher is hot and maybe un plug it.
SOURCE: abs problems i have a 98 k1500 the front right
Inspect the ABS sensor on the front wheels, make sure that there is no damage to the wire leads and that the ABS sensor is not damaged or touching the speed ring on the front wheel hub. You may be luck and the ABS sensor is dirty, it can be cleaned with a good spray of brake parts cleaner and make sure the ABS is not loose from the mounting bracket on the hub. Good luck and keep me posted.
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