Keep in mind brake hoses don’t always clog both ways. They can act as a “one-way” system where fluid goes into the line but not back out when the brake pedal is released.

This might be the solution! I’ve been battling a left front brake problem for quite awhile. Every time they replace the exact same parts that you just mentioned, but never the master cylinder. I didn’t think that a bad MC could affect only one wheel. Thanks for the video!

You are an excellent teacher. I am about to replace my 3 caliper on my truck and now I know that I need to possibly look a little deeper at the situation. Thank you!

Thank you so much for this video. I had a caliper lock up on me, got it replaced and the system was still holding pressure. You saved me a great deal of time and money. I really appreciate you putting this out.

It's interesting that only one wheel was getting effected. I thought anything to do with the master cylinder/ brake booster would at least effect two wheels. I learned something valuable from this video.

Enjoy how you thoroughly explain what you are doing and WHY.

Very detailed video. Guys like me need EVERYTHING explained in slow mo. lol Great video! Solved my problem on my Dodge Challenger!

wow my truck was doing just this. i changed all the same stuff and when i seen your video my brake booster and brake master cylinder was leaking. so this video was very helpful. i really appreciate you thank you so much

Maybe I missed it but it wasn't very clear on how you determined the master cylinder was also faulty and needing replaced. I'm at that point with a limited window to order parts and am unsure if I need to do both booster and MC or just booster. Edit: great video though, man. Thanks a million for putting it out there for us. 2nd edit: my bad I am one of those bums that comments before finishing the entire video, where at the end, he recaps and answers my unnecessary question. Sorry yall... I'm slightly ashamed of myself... but thanks again man. Solid content!

Thank you I really appreciate you walking me through some of the symptoms that I am having with my 2003 Yukon Denali brakes sticking. I replaced the brake calibers still sticking. Maybe it's my Brake Booster or Master cylinders.

Very helpful video. Now, I have to go check my truck out. Thought it might be the hose, but your video makes me think it is the master. A few test to figure it out. Thanks.

Wow im 5:02 in and i already gotta say thanks. Excellent way to rule out the caliper itself, by cracking the bleeder. Im currently beating my head against an 2007 and a half 2500 Duramax. Front pass. Caliper keeps sticking. Its so bad with a heavy load it completely destroys/crumbles the pistons in the caliper. Ive done caliper, rubber line, all associated hardware, twice now. New rotor the first time. No brake fluid is being lost anywhere... Ill check my master cylinder next and finish this video of course lol

That's great info on how to troubleshoot properly instead of throwing parts at a problem.

Going to try this to see if it fixes my brake problem, thank you.

What a great video! I've been battling the same thing and did the exact shade tree mechanic brake work the Silverado owner did. Finally took it to the garage and they diagnosed the booster and master cylinder. I hope this fixes the problem.

Very informative video and well done. Getting ready to do some brake work and this knowledge is great! Thank you

Once the slave cyl in my dads truck locked up the brakes because of cold weather and we removed from truck and manually pushed the rod and got out the clog and put it back on and it worked good

Thanks for the video. You really know your stuff. 👍👍

Great video, thanks for the knowledge and time spent on providing this video. Blessings

I have a similar problem, thanks for information. Good job

Very helpful. I had the exact same issue on the same side.. and unfortunately replaced all those same parts. Problem did not go away. thank you for the helpful information!

With that much fluid in the booster the customer must have been adding quite a bit to keep the fluid level up. That should have been the first red flag for them.

Great video young man, you know your stuff.😊

Thanks for the video. My denali was doing the exact same thing & I replace brakes,rotors,cylinders &lines.. It was driving me nuts trying to figure this one out

Thanx man! Very good video and instructions. Take care...

good information there, thanks for posting up

My avalanche 02 have the same issue, band new caliper. Thanks for your video

Just did my calipers. Have a master cylinder ready to go. Hope I don’t need a booster... fingers crossed.

Thanks for the video, it's nicely put together. Can you explain why it was only affecting the front left corner and not all of them when the fault was in the master cylinder.

great video thank you I just changed my brake hose also I don't think that was the problem going to do what you just done can you have this problem for a while

Ima really liking the new intro. Great job...

2006 Durmax , you made it well said and gave many diagnosis tips for me to try I will keep ya informed as I find the problem.The only trouble is I have zero interest in the boster due that its hard and im lazy..LOL Depending on the amount of brake fluid in booster, I may have an option to suction it out. I do understand the risk . Your great thanks.MJ 1:14 Update: after many hours and help from a local mechanic, we diagnose the exact problem for my truck. It was the ABS sensor going out. It kept it from going a particular amount of revolutions, and it was hard to find He had to use a multi meter and look at the factory specs after that no more problems I was so happy. Just wanted to share with the group.

FIRST VIDEO IV SEEN. LIKE THIS GOOD JOB. WELL EXPLAINED

Hello group yes American Heritage video helped tremendously with home brake repair 9n my 2005 GMC sierra. Exactly diagnosed, clip tips at cruise control mod, whole process start to finished. VERY helpful thanks soooo[ much guys. JH new m3xico

Loved your video very informative👍

You the best. Save me a lot of headaches.

I have same exact Truck as in the video, 279K miles. I had the dredded master cylinder leaking into the booster, so i decided while im replacing those let me go ahead and do new brake hoses, new pads, new calipers as well. Had perfectly fine working brakes before changing everything other than having to drain my brake booster and add fluid. once finished and wrapped up and bled the system. drove it around the block a few times, was fine, pedal felt squishy so i bled the brakes again, and then checked and they were better. Next day go to drive and make it a few miles from home and front end locks up and wont release. I've gone thru and double checked everything to make sure i didn't miss anything. I did the test that you did and when wheel is locked up i can crack the bleeder screw and it frees up the wheel. which then leads me back up the line to the Master Cylinder or ABS Pump ( i did have a couple of ABS wheel Speed Sensor Codes that i cleared) but still locks up even after clearing the codes. Could a brand new master cylinder malfunction from the get go of not allowing the pressure to go backwards? Is there a way to test the Master Cylinder? I have a decent pedal and it returns up when not running, with it running it also has a good pedal, After a few minutes of driving the pedal will start to act really strange where it'll feel squishy but will apply the brakes and the next time you press it it will get pretty stiff then at some point the pedal will be stiff right as you touch it and without being on the gas pedal the truck will stop on its own. Any Clue what it could possibly be? thanks for the assistance loved the video

Well done, from Tipperary, Ireland 😊

Thank you for your great video it helped me to know how to remove a master cylinder

I am just now about to give up on my 08 gmc sierra changed new calipers twice new rotors new brake lines new master cylinder because when I was bleeding I wasn't getting much pressure and pedal kept going to the floor so I replaced it also leaking at the seal so I can't get my driver caliper to stop locking up not as bad as yours but i am now ordering my vaccum booster thanks to your video I am doing this as my last resort before I take back to my mechanic god 🙌 bless

Tank you for a video! I have dgc 2008. I have 3 wheels seized. At ones. What it could be- calipers or buster? Thank you!

I have this same problem on an 06 Tahoe and I have had a new brake booster. New master cylinder, new brake calipers, new brake hose.

Thanks. Another place to look.

great video I am having the same problem as well, do you think I should inspect the master first? also, my abs light comes on as soon as I hit a bump in the road any ideas? Again thank you for this video and I am now a subscriber.

Thank you so much now I no it’s the brake buster your show was great 🎉❤

Thanks for the video it's a live saver

Very informative!

Awesome video man!! Great help to me..

I’ve changed rotor’s calipers pads and lines. Then I watched your video took master cylinder off and sucked all the brake fluid out of brake booster it was half full. Put new master cylinder on and I’m still having the front brakes locking up and the pedal gets real stiff. I know I got a vacuum leak from carchoal canister issue could that or brake booster valve be the issue?

Have you seen this a lot on many GM vehicles ?? Am having that of which the Ds spins when on jack stands and in Neutral, the PS is stopped when free but when braking it rotates about 1/2 -3/4 of a turn then stops ….have new calipers, pads, and bled the brakes…..and still same issue… any info would be great

When bleeding master cylinder, do both plugs have to bleed or only 1?

Vary helpful thank you gor making vids keep doin ya thing brotha

Good deal , brake system is a grey area for me. Like them fuel log looking thing that's down stream below the master cylinder... what does it do? If i build a buggy do I need one?

Superb explanation

I have a 2005 Chevy suburban with exact same brake problem I put new brake pads and calipers. But In my suburban I have a Hydro boost i’m just wondering can you be the same problem

I did what you said but I've got still got a mushy break about a half a pedal what do I need to do next

Had this exact issue replaced master and booster , now I'm having a hell of a time getting a break pedal bake. Bench bled master before the install. Maybe air in the abs unit ?

Would a sticking brake caliper cause a loud grinding noise coming from the front of the truck? I have an '02 silverado RWD. I recently replaced all four ball joints, sway bar bushings, end links, coil spring insulators, and brake rotors. Brake pads have plenty of life left and no signs of uneven wear. When I pull out of my neighborhood just after first start, when I turn the truck to the right or to the left, there is a very loud grinding noise coming from the front of the truck that sounds like rocks in a tumbler. After driving for a few minutes the sound goes away. My ABS and Parking brake light come on and off intermittently. Could this be due to a sticking caliper? I've done everything I can to fix the issue for over a year and still haven't found the source.

Do you have an idea what originally made hime go in for check? Was it the abs light or was he having any clunking? I have an 03 suburban and am having these same issues just bought new calipers allready replaced swaybar links and inner outer rods. Also at one point it would make the awful howl like was coming from the break booster..

Aaa crap.. 👁 👄 👁 me after changing a couple of stuff on my 1500 , but not this. Thank you man!!

It's my driver side rear drum building pressure after driving pedal gets tight .. My cousin had at one time adjusted the brake adjuster which had fell off

Question: I replaced my calipers, brake lines, bled the brakes, the master cylinder and rotors are 2 years old...the only thing I haven't replaced is the Brake Booster...my front wheels are always rubbing my rotors to the point where there's resistance for them to heat up after a short while of using the brakes...do you think that could be because of the Brake Booster??

Thanks for the content.

On my 3rd caliper, thanks for the info

Why does only one brake grab ? I’m having the same issue ! Thanks! Great video

Ey buddy I have 2011 chevy silverado 2500 hd gas , and the all 4 calipers locked up ,do you have ideas what happened?

gracias tengo el mismo problema ya cambie discos balatas y caliper y sigue igual se calienta todo y el freno se ase asta arriba y se queda frenada tengo 05 gmc sierra 6.0 clasica ...gracias por compartir tu conocimiento

Hey thanks for that video I have 2005 Chevy Silverado and I replace the same caliper twice already and I start thinking that the caliper it’s not the problem

I have an 2009. Bad wheel bearings a few years back and went ahead and changed them out along with brakes and calipers and rotors etc. Had excessive heat on the front end still. So I took it to a mechanic shop. They retooled the rear drums replaced the brake lines said they were collapsed. Still excessive heat just had a friend of mine check a few things out he use to be a mechanic. Noticed i hangs up still just not a full on lock up just enough to create the extra heat. So I'm pretty sure my issue might be along the lines of what you just showed me. My question is what would a brake booster and master cylinder replacement and brake bleed service generally cost at a shop

Have a 2006 Chevy Silverado. Customer had placed ATF in it because the brake fluid level was low and caused the front brakes to start dragging and overheat which made the abs sensors melt. They replaced the rotors, pads, calipers, front brake hoses, and front wheel speed sensors. The front rotors still dragged and they replaced the master cylinder and cleaned out the brake booster. They can no longer bleed the rear brakes even though the front ones do bleed. The front brakes still drag. I pulled the Master cylinder off the booster and no change. Cracked the bleeder screws on the new calipers and they still drag. Only way to free them up is by manually compressing the caliper piston. Do you have any idea of which direction to pursue? The master cylinder was bled properly. I bled it myself to try and bleed the rear.

I have a pull to the right when braking ,i took off the left caliper and pressed the brakes with the pads out. The piston only protruded a quarter of the way out. No matter how many I stepped on the pedal the piston only moved about 3/4 off the caliper . I will try the drip test , but I am wondering if this could be the piston is rusted or possibly an ABS problem. Should that piston come all the way out if you keep pressing the pedal?

Have my 2 front brakes dragging the same. Calipers free, greased, slide. Flex lines changed. Fluid blown out and flushed. Master cylinder changed. Still dragging

Thank you so much. I have all 4 calipers sticking on a 99 silverado Z71. Did new calipers and pads. They worked for 200 miles. Booster and hardware time.

Thanks for the great info 👍 I wish you were in Central Florida!!!😢

Have one in the shop just like that one but the right front and the owner had replaced the master cylinder, lines and front brakes a couple of times. I found the booster full. Questioned the owner about it and he said that someone told him it would not cause any issues so he didn't change it. Well I did change it. And because he wanted the brakes done again we did that too. Oh and also found that the brake calipers were installed upsidedown (on the wrong side). It still doesn't free up like the left front or like I think it should. And no abs codes but it does read 3mph at each speed sensor even KOEO.

Ive replaced everything 3times. Except the brake booster on my 2011 ram. Works a little while then starts hanging up again. Today they hung up again. I pulled the hose off the brake booster and air poored out the brakes released. Any idea why the air would be building up in there? Thanks.

If I am not losing any brake fluid, does that mean I don't have this problem? Had my right front caliper almost seize up, was driving down the road and when I braked, the truck pulled hard to the right and kept pulling even when I got off the brake. Pulled over and my rotor was smoking like crazy. Babied it home, I replaced all the front pads, rotors (they needed to be done anyway), and both brake calipers. I never lost fluid leading up to this. Now when I did my test drive after replacing everything, there is noticeably more heat coming from the right front brakes then the left front brakes. I don't have a temp gun to verify temps but it sure feels hotter on one side. 06 silverado 1500 w/ 235k miles. As far as I can tell, booster hasn't been replaced.

Very good video

I’m having the same issues with my car and I’ve already replaced the Master Brake Cylinder now I’m going to change out the two from Calipers because I believe that they’re causing the brakes to lock up every once in a while causing my car to slow down. I would greatly appreciate any advice. Respectfully

Damn it man ..i did wat ur customer did its a chevy 2500 express .i going to ck that next ..i talked to several mechanics non told me wat u have ..i hope this fixes it sounds like it might. Same set up too ..i get back with u today to let u know if this fixes it..thank you for ur knowledge ..im a heating & cooling contractor 30yrs worth .i always got ppl calling me to help them fix their ac or service tech calling ..hey i always try to help. Wen i first started and even now i run into stuff where i call my mentor. So it only rt to pass the correct knowledge wen u can ..get back to u soon tks

Did the fluid in the booster render it inoperable? Assuming the fluid could be drained it seems like you could just put in a new master and seal?

I replaced the the brake booster on my 2003 yukon denali. It was leaking power steering fluid. I went on a test drive. After about 2 or 3 miles, the front brakes got smoke hot and locked up. The calipers bled down after about 50 minutes. I will check the calipers and brake lines to see if there is any blockage. I think that the master cylinder may be weak. My truck has 348,00 miles on it I have done normal brake work I have replaced the pads, rotors and hubs in the past. The master cylinder was replaced 150,000 miles.

I have a question I have a 2015 Chevy suburban and just yesterday I smelled a burnt rubber smell in the passenger rear wheel do you know what that can be I check for leaks and didn’t see anything.

What if you have your brake start holding without applying pressure? This is happening on a bike of mine and also a friends truck.

I had / have a similar issue. We replaced the master cylinder first because it was leaking but didn't replace the breaker booster. Just cleaned out the fluid inside. But now 1 month later my breaks started sticking. I replaced both front calipers. While it did improve I can still feel an issue. Do you think the break booster should be replaced as well?

Really nice and helpful 👌👌👌💪💪💪

Question I was bleeding the rear breaks and I dont see any break fluid coming out from the bleeder screw so I then opened the break line house and still didn’t see any break fluid so I went under the hood and on my abs module I found the rear break lines and I opened them up and I can see break Fluid coming out what can It be my break lines or can it be the abs going out.

Could the booster failing/leaking cause the same situation on a rear wheel? or is this situation specific to only the front end

i have a 2003 Chevy suburban. the left front caliper is sticking but only sometime when i drive. abs light is on. any ideas on what it could be?

Good video sir

Great job

I’m having the exact same issue and it’s been a nightmare to figure out I’ve done the same things replacing the brake line in the caliper only to have the same issue. My question is why would a bad master cylinder only effect one tire?

when i park on a slight hill and stop then press hard on my brakes then let off the brake peddle off the brake holds on for 2 seconds before it lets go, i changed the calliper and hose but its still the same, can you help me diagnose it please? thank you

so I got my back brakes changes and rotors and calipers and front struts and now my front drivers side brake is catching the caliper or something is grinding replaced the front pads & still doing it, it didnt make the noise before I got the brakes done in the back crazy now im hearing sounds in the front brake drivers side.

I have the same issue in a 05 suburban. I did everything the customer did and now I’m thinking it might be my master cylinder. I have a hydro boost system. I bled it all. Drained and replaced new fluid. I replaced the hydroboost, all pads, and calipers. Not once have I checked the master cylinder because I never saw any leaks.

I'm just curious as to how the bad master and booster caused only one brake to not work instead of affecting all of them?

I'm having the same problem with my 05 GMC Yukon Denali XL 6.0 but it has a hydro booster what could the problem be I changed the hydro booster new and Master break cylinder new new caliper's and break hoses and rotors but the breaks lock up after a week.!! Please help.!!

Good work

So I'm having something similar with my front right brake. Replaced my front calipers because they were rusted out pretty bad & replaced rotors and pads because of wear. After starting to bleed off the calipers, i noticed the right caliper would not bleed off unless the truck was running. All 3 other tires would bleed off with the truck off, but the front right would not.... Unless the truck was running. I ordered the front 2 brake lines because I also know the lines can get ripped from the inside and not allow pressure to pass by. After driving it, i notice the temperature of the front right caliper to be the hottest of them all leading me to believe the caliper is sticking. Do you think booster and cylinder are suspect on this?

So can you explain just for me to understand. What is the booster doing to make it lock?