Question about 1993 Chevrolet C1500

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1993 gmc c1500 little or no brake pressure

I rebuilt a leaking wheel cylinder and bleed the brakes now i have little and/or no pedal pressure

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Make sure your using DOT 3 brake fluid.Thanks for asking and I hope this helps out.Please leave me 4 thumbs up.

Posted on Jul 20, 2010

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1 Answer

1993 4wd. Why aren't brakes working?


Does the brake pedal go to the floor? Or does it stay up, and is hard to push...? Did you bleed the master cylinder? Also, you will need to bleed all 4 wheels connection to the brake wheel cylinders...you must start with the rear, farthest from the master cylinder, then other rear, then front farthest from the master cylinder, then other front...the bleeding of each line is a must, since you switched the master cylinder.

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2001 Dodge van 3500 losing brake fluid but can't tell where


Most likely you have a cylinder in the rear leaking, and it's just slinging it off as you go. Your van should have front disc brakes and rear drum. Cylinders are normally $10 to $20 each. Wouldn't hurt to inspect both

Feb 18, 2015 | Dodge Cars & Trucks

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Jeep brakes


It is very difficult to diagnose this problem with the little bit of information you gave. If the brakes are drum brakes check to see if the brake cylinder is working and has no leaks, lift the rubber seals and make sure there are no leaks there, check the brake adjuster make sure that works okay. If everything works and you bled the brakes properly, then the problem is most likely is the master cylinder or the wheel cylinder.



While bleeding the brakes always make sure you check the master cylinder reservoir to make sure the fluid level is up so you do not get air in the brake lines. When bleeding the brakes did you have someone press down hard on the brake pedal hold the pressure on the brake pedal when opening the bleeder then push the brake pedal to the floor keep it there, until you tightened the bleeder, then pump the brakes up and hold it there, while you repeated the bleeding operation by opening the bleeder when the brake pedal go\'s to the floor keep the pedal down until you tighten the bleeder and then pump the brake pedal back up then check the fluid level in the reservoir, keep doing it until the brake fluid shows no sign of air.



If the brake pedal is pumping up during the bleeding process and you made sure you got all the air out of the brakes and then the pedal go\'s to the floor, make sure the fluid level is correct in the reservoir and the bleeder is closed tight and there are no leaks in the lines, wheel cylinder, brake cylinder the brake adjuster is working and master cylinder, and if you still have no brakes then it must be a defective piston in the wheel or brake cylinder, if there is a seal problem with the pistons you will not get any pressure to push the brake fluid. let me know how you are doing.

May 29, 2014 | 1990 Jeep Wrangler

1 Answer

Good brake pedal till i start the truck then it gets soft


You need to adjust up the rear brakes and also check back there for leaking wheel cylinders and maybe even a bad bearing in the axle assembly, worn shaft,accompanied by a leaking axle seal that will appear really nasty and smell bad too...

I have also seen this model with a crappy pedal when the brake hoses have become softened and expand under pressure

Jul 28, 2012 | 1988 Chevrolet C1500

1 Answer

2001 silverado hd. i pushed hard on brakes there was a pop like i blew a line but no leaks, pedal went to floor like line blew also. brakes still work but pedal is pushed to the floor to stop. I bled...


Hi oakleafwoodw, sounds as if the brake master cylinder has busted a seal allowing the brake fluid to leak by cylinder when you push the brake pedal giving you no or very little pedal pressure....it is located under the hood on the drivers side firewall, you will see all the brake lines attached to it , remove those and the two bolts holding it on,take it with you to auto parts store for a rebuilt one , they will keep your core for rebuilding, other wise you pay a core charge., verify that they have the one you need before hand, get a quart of dot 4 brake fluid, hook it up, and bleed air from the brake lines starting with wheel cylinders in this order Right rear......left rear.....right front.....left front...making sure to keep fluid level topped off in the master cylinder during the whole bleeding process or you will pump air into lines....OK!! caution: you should not drive it until you have good brakes!! you said they still work but if you had to stop suddenly ,it won't do it.

May 23, 2011 | Chevrolet Silverado 2500HD Cars & Trucks

1 Answer

My 94 c1500 has very spongy brakes.I have replaced brake booster,master cylinder,porportion valve and both rear wheel cylinders.brake pedal will get firm when applied too bleed brakes but not much fluid...


You still have air in the system. You will have to bleed more. I had to bleed a quart of brake fluid out of each wheel to get good brakes on my 1996 GMC.

Jul 29, 2010 | 1994 Chevrolet C1500

2 Answers

Ive got some brake but pedal will almost go the floor rebuilt master cylinder


If the pedal is going to the floor there is either a leak in the system allowing air to enter or the brakes weren't properly bled after the master cylinder was replaced leaving air in the system. Either way you need to figure out why air is in the system and get it out.

Jun 08, 2010 | 1982 Alfa Romeo Spider

1 Answer

How to bleed front brakes?


hello, your going to need a buddy in the truck pumping the brakes while you bleed them. With that first you need to verify that the master cylinder is full, if it is you can get started, there are two ways you can do this, the first is called a non-pressure bleed, this is when you break the bleeder loose and have your assistant push down on the brake pedal and when it is all the way to the floor you tighten the bleeder up before they release the break pedal. The second method is the pressure bleed. this one is a little bit more messy, you will have your assistant pump the brake pedal several times and hold firmly while you break the bleeder loose, the pressure will force the fluid and air out quickly. you will have to bleed both wheels untill there are no more bubbles in the fluid coming out. be sure to keep checking the master cylinder to verify that the brake fluid is full.

May 18, 2010 | 1995 GMC Sierra C1500

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

After replacing master cylinder, right rear wheel cylinder, vacuum booster and bleeding system forever RR,LF,LR,RF i get good pedal, then i crank the engine and lose all pedal what is wrong?


check for leaks sounds like when pressure goes up u are loosing fluid some where, also check vacuum line to booster hope this helps

Jul 07, 2009 | 1993 Saturn SL1

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