Question about 2001 GMC Jimmy

2 Answers

Replaced brake line, rotors and pads bled brakes all around and the brakes when the truck is off work but once i start the truck the brake pedal goes to the floor and have no brakes at all?????????????????????

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 7,789 Answers

You may need to pump the pedal a bit to bring the new pads into contact with the rotors. You may also have a bubble in the ABS system. There is a special procedure using an ABS scan tool:
Bleeding Procedure

Raise the vehicle in order to access the system bleed screws.
Bleed the system at the right rear wheel first.
Install a clear hose on the bleed screw.
Immerse the opposite end of the hose into a container partially filled with clean DOT 3 brake fluid.
Open the bleed screw 1 / 2 to 1 full turn.
Slowly depress the brake pedal. While the pedal is depressed to its full extent, tighten the bleed screw.
Release the brake pedal and wait 10-15 seconds for the master cylinder pistons to return to the home position.
Repeat the previous steps for the remaining wheels. The brake fluid which is present at each bleed screw should be clean and free of air.
This procedure may use more than a pint of fluid per wheel. Check the master cylinder fluid level every four to six strokes of the brake pedal in order to avoid running the system dry.
Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure. Release the brake pedal between each test.
Bleed all four wheels again using Steps 3-9. This will remove the remaining air from the brake system.
Evaluate the feel of the brake pedal before attempting to drive the vehicle.
Bleed the system as many times as necessary in order to obtain the appropriate feel of the pedal.

Posted on Sep 29, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 4,336 Answers

Bench Bleed the M/C first, then do not let it run dry during system bleeding. Parts stores sell a kit that helps installed m/c bleeding.

Posted on Sep 29, 2010

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

emissionwiz
  • 75235 Answers

SOURCE: brake pedel pushes to the floor

pump the pedal about 10 times and see if it comes back up, u need to pump the caliper pistons out after a brake job.

Posted on Jun 27, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Is there an answer brake pedal going to the floor after replacing front pads thought it must be the master cylinder replaced it and bleed master on bench and system


the full brake system has to be bled starting at the longest line first and ending at the shortest

when pads are replaced the piston has to be pushed all the way back into the calliper housing and the first application will always go well down as the pads are moved back out to contact the rotor
it will require several pumps for this to happen
priming the master cylinder before installing is good practice but unfortunately air sill gets into all the lines and that is why a full bleed is necessary
if you still have problems get a professional brake shop to diagnose the problem and a quote

Aug 19, 2016 | Cars & Trucks

1 Answer

My 1998 ford taurus brake pedal goes straight to the floor .


Brake line busted somewhere? Is the linkage to the master cylinder intact? Master cylinder might have been installed incorrectly.

Dec 04, 2013 | Cars & Trucks

4 Answers

Brake pedal goes nearly to floor front pads, calipers, brake hoses changed, rotors turned Master cylinder changed, brake booster check valve changed rear brakes checked, drums good no ridge, shoe's...


I would go with not bled correctly

The booster should hold up with a hard pedal until
you start the engine, then vacuum causes it to move
down when pressing on the brake

Sep 16, 2011 | Saturn SC Cars & Trucks

2 Answers

Just replaced rotors, calipers, caliper brackets, and pads. Bled all four wheels, starting with the farthest away from the master cylinder working my way to the closest. Brake pedal feels firm when car...


Bleed with the car running and make sure all the air is out. Now make sure there is no leak and the pad contact are adjusted without much gap so that the calipers hold on. make sure the servo assist is correct, if so and the master cylinder was set right , it must work. Please recheck all your work once again to trim up.

Sep 28, 2010 | Nissan Xterra Cars & Trucks

2 Answers

I bled the brakes after replacing a broken line and the brakes are still soft when started. im sure the air is out of the lines. what else could i check


If you replaced the line without replacing the rotor and pads this thing leaked fluid on it will never work right. Once brake fluid leakes unto pads an rotors they are useless.
Furthermore, if the brake hoses are worn they should be replaced.
Lastly recheck the fittings of the line you replaced . make sure you didn't cross thread the fittings and the connection is tight.

Apr 02, 2010 | 1998 GMC Jimmy

5 Answers

Brake pedal goes to the floor only when engine is running. Pedal is perfect with engine off.


your power brake booster is blown out
the seal has a leak in it
run the truck for 3 minutes and shut it off. with the windows up listen carefully while you gently apply the brakes
listen for a hissing sound of air leaking.
the sound of these leaking is a very soft sound

Mar 27, 2010 | 1998 Chevrolet K1500

1 Answer

Pistons in both front calipers stay out, both calipers replaced


You may have a leak in the booster or master cylinder. You can put a pressure tester on the system to test for leaks. It does sound like you have an air leak.
You can try to bleed the master cylinder, then slave cylinder, then brake lines.

Aug 24, 2009 | 1993 Oldsmobile Achieva

2 Answers

1989 Ford F350 2 wheel drive dually 460 ci gas motor


5 Inspect Brake Fluid Type Brake fluid loss or contamination grey_line.gif 10 Inspect Master Cylinder (Brake System) Worn or leaking brake master cylinder. grey_line.gif 11 Inspect Brake Power Booster Damaged booster vacuum line/check valve, or diaphram

Nov 24, 2008 | 1989 Ford F 350

Not finding what you are looking for?
2001 GMC Jimmy Logo

1,134 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75197 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...