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1999 gmc truck replace brake lines and bleed them and i got sponge petal still

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Replace the master cylinder and check the condition of the brake pads.

Posted on Apr 10, 2011

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What special tool is need to bleed brakes on 1999 gmc sierra? Had to replace all lines due to rust. I can only get the front driver side to bleed. The brake peddle is like steeping on steel. ...


You can actually bleed each caliper at the brake line connection to the caliper...you will need someone to depress the brake pedal, or you can borrow the auto bleed brake pedal tool from your local auto parts store...sounds like you can fix this yourself...the symptom says..."air in lines"...Hope this helps.

Feb 21, 2011 | 1999 GMC Sierra

2 Answers

Hello sir.. i am bleeding the brakes in my 99 gmc sierra, i have replaced all the brake lines minus the two lines in the rear that route to a t, now from past this all the lines are new, everythings tight,...


U need a special tool that holds the poppet valves open in the ABS hydraulic control unit to bleed the brakes of air, without it u CAN'T get the air out of the system.

Sep 28, 2010 | 1999 GMC Sierra

1 Answer

Brakes are sponges


if you changed your brakes and you disconnected any lines from any caliper, or you had a leak. you need to bleed your sistem. if it was a particular tire just bleed that one other wise bleed all four tires.

Sep 18, 2010 | 1994 GMC Sierra

4 Answers

I have a 1999 gmc sierra .the front brakes lock . its a 2 wheel drive . what is the problem


Could be the proportioning valve, master cyliner or the front calipers going bad. You didnt say the milage or if you have had the brakes serviced.

Feb 16, 2010 | 1999 GMC Sierra

3 Answers

No brakes push pedal to floor


leaky rear break cylinder or master cylinder

Oct 02, 2009 | 2001 Chevrolet Blazer

3 Answers

Replace brakes. now they go to the floor. bled air


When you fixed the brakes, did you take the lid off the master cylinder. I just wonder if you spilled out your brake fluid. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. Check the fuse. Check the brake fluid level. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. Please give me a good ratin and keep me informed.

Jul 07, 2009 | 1999 Cadillac DeVille

2 Answers

Parking brake petal goes to floor


you either have air in the brake lines, a cracked brake line, or low of brake fluid... either way you will need to bleed the brakes

have you had the brake pads changed recently?

May 02, 2009 | 1999 GMC Sierra

2 Answers

ABS bleeding technique on GMC Yukon


If you forced the pads back into the calipers without loosening the bleeders you probably forced gunk into the abs modulator valves. Sometimes doing the automated bleed proceedure (need Tech or Bi Directional Scanner) will bring things back to life.

Nov 30, 2008 | 2003 GMC Yukon XL

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