Question about 2002 GMC Sierra 1500

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I have just replaced all my break lines and now i am trying to bleed them and i am doing the pumps on the break then letting the air bubbles out but it seems to be not working, just wondering if there is other ways then that?

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You may need to take it to a shop which has special equipment to bleed electronic ABS systems, Not sure about this for your truck. You are doing it correctly for older brake systems. My 2004 Ranger requires special equipment.

Posted on Nov 09, 2012

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Cant get any brakes on truck.i have bleed everything including vacum bleed.why cant i get breaks to work

indicates that the piping has a rise in it that is above the master cylinder
that point will be where an air bubble is forming and that will be your problem
you may be able to get the air out using a pressure bleeder pump
try positioning the lines better or you may have to incorporate a bleeder screw at that high point
an example of this problem is in the piping of the nissan mq patrol where the brake lines in the fire wall were looped around and higher than the M/cylinder requiring a pressure bleeder pump to quickly bleed the system

Aug 08, 2017 | Cars & Trucks

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My 5.9 dodge cummins diesel won't start, I've replaced the fuel lift pump, and the fuel filter, turns over. But will not start?

Most likely you just have air in the lines.Crack them open one at a time and bleed them with the fuel pump off and on till you get fuel.If it fires dont hit the throttle let it sit and idle and close the line.Does it fire up with a small whif of starting fluid?

Mar 17, 2013 | 1999 Dodge Ram

1 Answer

Have bled brakes after replacing 2 lines, wheel cylinders,master cylinder and pedal goes way down when truck is running

Make sure the rear brakes are adjusted up first. Often times it helps to let the system "gravity bleed" for a while. Open the bleeder screws and let gravity do the rest. Keep the master filled up and catch the run off at the wheel.Let it bleed until the fluid runs steady in a clear stream. This will remove most of the air in the system. Then you can do the "pump the pedal" thing.

Did you " bench bleed" the master cylinder before you put it on the truck? If not, do it now. Simply remove the brake lines from the master and replace them with short open lines to a bucket or even back into the master. Fill the resevoir and pump the cylinder until there are absolutely no bubbles coming out of the short lines. Then reattach the brake lines and start all over with the bleeding process. Hope this helps.

Sep 25, 2011 | 1995 Chevrolet K1500

1 Answer

Rear brake line was leaking, so replaced it with new line, now cant get the brakes to bleed, thinking its the servo, does this need to be reset? tried pumping the brakes then pressing it to the floor, not...

Is the master cylinder full of fluid? When you replace a line like that it takes a fair amount of fluid to fill it and anything else you disconnected. Its very easy to pump the master cylinder "dry" or it can even leak dry while you are replacing the tube. You have to constantly monitor the master cylinder while bleeding a long line. When the fluid gets below the hole in the bottom of the reservoir it will not pump. The easiest way to do this is to have a helper. One person pumps and the other monitors the reservoir. You have to keep the fluid in the cylinder all the time you are bleeding or you will continue to get air in the tube. Fill the cylinder reservoir BEFORE IT IS EMPTY. You also have to use a check valve bleeder or someone has to open and close the break cylinder each time you pump the pedal. Otherwise you **** air back into the line when you let off the pedal. If the bleeder valve is always open you only push our air and **** it right back in. You can never gain on it. All this can be done by one person if you have a bleeding tool that has a check valve in it to keep the air from going back into the brake cylinder. You can find these tools at auto part suppliers. BE SURE YOU USE NEW UNUSED BRAKE FLUID OF THE PROPER TYPE. Fluid that has been exposed to air more than a very short time absorbs moisture from the air and makes it unusable. Make sure you pump enough fluid through the new line to be sure there are no air bubbles in it. When you are sure it is bleed completely, fill the master cylinder with NEW fluid to the fill line. It takes a while to get this done especially if you are working by yourself, but it can be done. Good luck.

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Jul 19, 2011 | 1993 Chevrolet Cavalier

1 Answer

I replaced all my brake lines. How do I bleed the air out?

Make one guy in string side
Let him push the break
Have assistant pump brake pedal and hold approx. 2/3 down
Open bleeder screw and observe bubbles in container
Close bleeder screw and repeat until no bubble are observed
Repeat at next wheel
Make sure master cylinder does not empty during procedure.

Jun 03, 2011 | 2003 Chevrolet Silverado 1500

2 Answers

I just replaced brakes,front and rear,on a 1997 jeep grand cherokee. The rear brake calipers had to be replaced and the parking brakes were shot so I did not reinstall. I bled brakes all around and have a...

Sound like you either have air in the system or a leak. Make sure all the connections are tight on the new calipers. clean off all the connections and blessed screws with brake cleaner. Then have your partner press on the brake pedal while you look for leaks. Reblead the entire system again starting at the right rear, than the left rear, than the right front, and finally the left front. Continue bleeding at each wheel until no air comes out. make sure you don,t let the master cylinder go dry. It will take several pedal pumps for the caliper pistons to take up the gap in between the pads and rotors. I assume you have a helper pushing on the brake pedal during the bedding process?

May 30, 2011 | 1997 Jeep Grand Cherokee

2 Answers

Just changed rotors and front brake pads. Pumped pressure back with break pedal. After you start vehicle all break pressure is lost- no breaks. Whats going on?

You are either low on brake fluid or you have a vacum problem. It is a long shot but possible the Master Cylinder is having an issue or an air bubble in the system. Start the vehicle and make sure it is blocked. With the engine running perform system bleeds on all four calipers. Pump 3 times then release bleed valve. You are going to need a couple bottles of brake fluid to bleed all these calipers and get the air out of the lines. You should make sure the primary vacum is connected to the master cylinder and that there are no leaks on any lines before you start the bleeding process.

Jun 24, 2010 | 1999 Toyota 4Runner

2 Answers

1996 Ford F 150 Having brake problems....

take the cape off the break reservoir start with the rear break farthest from the master cylnder then do other rear break then the front farthest from master cylinder . If you have ABS then look in the owners manual under maintance it should give you the procedure

Nov 23, 2009 | 1996 Ford F150 Regular Cab

1 Answer

Trouble Bleeding Break Line

you need to hold in the metering valve.when you bleed the front brakes.long as the valve closed off you wont be able to bleed front brakes.better to get extra help.hard to bleed by your self .

Apr 20, 2009 | 1988 Oldsmobile Delta 88

1 Answer

96 nis max rear break dont work

Sounds like you have a blockage in the brake line going to the back breaks...maybe a kink in the brake line or maybe the junction piece (found attached to the bell housing in the back) that sends brake fluid to both breaks in the back is bad. Or your rear breaks need to be adjusted... I would say brake cylinders, but I doubt both would go out at the same time. Also check to make sure your master cylinder is working ok and there is no air in the line...try bleeding the back brakes to see if any fluid is getting to the brake cylinders in the back, this will tell you if you have a kink in the line or air...if it bubbles when you check (bleed the lines) then your problem is air in the line and should be bled until you get a solid flow of break fluid with no bubbles at all. If you want to know how to bleed the rear break just write me back and I will instruct you on how to do that.

Apr 19, 2009 | 1996 Nissan Maxima

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