I have a 93 GMC 1/2 ton 350. I have no brakes. I have replaced the calipers on the front, rotors on the front and pads on the front. I also replaced the master cylender and reservoir and flushed the lines. The last thing I replaced was the R side brake hose that goes from the caliper to the brake line. I bled off the system from the rear to the front. With the truck off I get in to pump the brakes and they stiffen up like normal, I pause for 15 seconds and press pedal down and it goes all the way to the floor as if their were alot of air in the system. Then I start the truck and the pedal automatically goes to the floor when pressed, it wont pump up at all. I have checked all the lines / hoses, and calipers and see no wet spots / leaks. I seriously bled the system so much that I went through 5qts of fluid. Do you have any other ideas that I can try?
Thursday, February 24th, 2011 AT 8:29 PM