Chevy S10 pickup brake issue

30

Asked by Jun 05, 2017 at 05:22 PM about the 2003 Chevrolet S-10 3 Dr LS 4WD Extended Cab SB

Question type: Maintenance & Repair

I have a 2003 chevy s10 pickup. I just lost my brakes the
other night but managed to make it back home after they
went out. I installed new brake lines and new vacuum
hoses to power booster. I bled all brakes and have fluid in
lines. When the truck is off and brake is pushed, its very
stiff and hard to push down. If I start truck and push brake
it sounds like a burst of air coming from under dash and
it's very easy to push to floor. I tried gravity bleeding the
brakes to make sure I had all the air out and it's like the
fluid won't circulate through pipes. I tried manually
bleeding brakes one more time and still have same result.
Does anyone know what I should do to fix this? I'm at a
loss!

7 Answers

580

Was anything leaking before you changed lines. Are your rear wheel cylinders leaking. Or do you see any fluid running down from mastercylinder. Was mastercylinder still full of fluid

1 of 1 people found this helpful.
30

Yes, there was a leak before I changed lines which is what cause the brakes to go completely out. No fluid running down from mastercylinder, at one point in time the fluid was drained out of master cylinder before I realized it.

1 of 1 people found this helpful.
580

Ok get someone to help you to bleed mastercylinder. You can do it while still on truck. Just pump up and crack the brake lines loose. Do each one a couple of times and do you have access to a scan tool. You will need to do a power bleed on the abs motor. Purge the air from and pump and then bleed brakes starting with furthest one away from mastercylinder. Might not have to do a power bleed. Might be fine without doing power bleed

1 of 1 people found this helpful.
30

I also tried bleeding mastercylinder and then did the rest in that sequence all except the ABS module. I don't have the scan tool, but my guess was there's air stuck in it that I can't get to.

1 of 1 people found this helpful.
580

Check to see if you have bleeders on abs motor.

2 of 2 people found this helpful.
30

Okay will do. Thank you for the help

1 of 1 people found this helpful.
580

There should be two bleeders on motor. If so, you'll need someone to help you. Whoever is pumping. Apply pressure to brake pedal like holding at stop light. The other start with bleeder closest to engine. Open bleeder and push brake pedal to the floor and hold until bleeder is tightened. Don't shove to floor push lightly until fluid is clear. Once that one is done. Repeat process with other bleeder the same way and then rebleed brakes all the way around again

1 of 1 people found this helpful.

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