I have a 1993 chevy g-20 van with 130,000. The left front caliper stays compressed causing the van to pull to the left. When I step on the brake the van pulls to the right extreemly hard, which tells me there is no pressure going into or out of the caliper. I have changed the caliper and the master cylinder but no change. I did notice the abs wheel sensor wire was rubbing on the tire but the wire is not broken.
If I jack up that side of the van the wheel is very hard to spin by hand. If I loosen the bleeder valve it releases the pressure and I can spin it and it will spin on its own. I will try changing the hose. Could it be the proportioning valve? The abs light is on as well. The hose is cheeper, i'll try that first.