1993 GMC Sierra 1500 both front brakes not releasing after letting off brake

Cut the cables close the rear brakes. OR replace both of them.

GMC Sierra C/K 1500 Questions - brakes hard to push to ...

www.cargurus.com > Questions > GMC > Sierra C/K 1500
CarGurusJan 31, 2010 - i have a 94 k1500 sierra, the brake light is on and my front brakes are locking up. ... at a set speed (say 70) and gently let off the accelerator it bucks one time. ... the truck will start up most time fine with a little gas, after about 30 .

Sounds like the master cylinder is not releasing. Replace it

replace the front brake hoses on both sides...they are a wire mesh inside the rubber and they deteriate after time and only let fluid go one way and wont let caliper release properly....good luick...Lee

the most common cause is wheel speed sensor or sensor wiring not reading proper wheel speed.it is also possible the reluctor wheel inside front bearing is clogged with rust and debris and unable to send magnetic pulse. This can be tested with scanner to determine wheel in question.ohm meter can be used to test sensor and reluctor pulse.

check for front brake calipers dragging, if the are replace calipers and front brake hoses, if calipers ok replace master cylinder, This is how to check calipers, jack up front of truck have some one apply brakes and release as soon as they release the brake peddle the wheels should spin freely if not brake the brake line lose at master cylinder if wheels spin free with line loose replace master cylinder, if not replace calipers and hoses.....HOPE THIS HELPS

No, there is no adjustment aside from being certain calipers are not binding. Be sure the M/C is fully releasing.

they used those on the full sized trucks and suv's so you might want to try a salvage yard..

check brake lines they may have gotten pinched very commonok new c/k trucks when you crank the torsion bars up to far you may have hit something and pinched the brake line check those before messing with the master cylinder those are a real pain

Sounds like a rear end ratio problem ECM malfunction