Repairing a Leaky GM Hydroboost (Powersteering Leak)

[@lukemaas2954]

Worked great on my GMC 2005 Yukon Denali XL, 1500 6.0. I purchased the kit in the link and it worked perfectly! I would recommend cracking the E12 bolts that keep the hydroboost together before removing it from the firewall, mine were really stuck in there and it was difficult to crack them once I had pulled the unit from the vehicle. You live, you learn. Also, I had a hard time putting the hydroboost back together. I could push both halves close together, but not quite all the way. I thought I might be caught on something, but couldn't see any problems. Eventually, I just barely started all five of the E12 bolts and then slowly tightened them in a star pattern to keep the pressure even as the two halves of the hydroboost came back together. I was hesitant to do this because I didn't want to damage anything that shouldn't be forced, but it worked like a charm, don't be afraid, just be careful. Also, there are o-rings on the two threaded hoses that you pull, they don't really fly out, but be sure to keep an eye on them when you disconnect the hoses. All in all, it took me about two hours. I could do it again in one. Hope this helps. And great video man! Thank you! You saved me a lot of money. And good luck to everyone out there! As far as automotive jobs go, it's not that bad, you can do it.

[@stlouissux9119]

Great tips! Thanks for sharing, I'm sure others will find this useful.

[@lukemaas2954]

@@stlouissux9119 Thank you for the video! I'm efinitely glad you made this, it saved me a lot of money!

[@emmbeemeeapparel2046]

I'm doing this tomorrow on the same vehicle 05 Denali xl. Thanx for the confidence boost!

[@csmith6237]

Just did this last weekend. Took me about 3 hours, the clip on the brake pedal was the hardest part because I didn't want to damage it. I ordered the whole seal kit from eBay for $35 just to get the one seal (I didn't want to order 1 seal and it not be correct so I got every seal in the hydroboost at once). Did the brake bleeding at the end and drove about 10 miles before brakes went back to normal pressure. It's been about 100 miles and I don't have a single drop of leaking fluid. I'm very happy and thanks for the video!

[@stlouissux9119]

Very glad we could help!

[@hundrethmonkeyjedi]

Was about to buy a whole new unit till I found your video. Took me less than an hour and less that $10 to fix mine. Thanks for posting! The bolts under the dash are hard to get to....unless you have a mechanically inclined 10 yr old to help....then it's a piece if pie!!!

[@stlouissux9119]

Glad this could help!

[@MrDanielCitizen]

what is the part number for the seal you used. 2004 chevy suburban 1500 gas

[@missiletm]

I gotta get me one of those 10 yr olds to help me

[@Le_Comte_de_Monte_Felin]

THAT is a helluva lot cheaper than a replacement hydroboost unit! Thanks!

[@stlouissux9119]

Not a problem, glad we could help!

[@maxsanchez2339]

Hydro boost its very expensive, while you have it off you might as well replace it with a 2011 model way better braking.

[@carlitosortiz2870]

​@@stlouissux9119but where was the exact leak at

[@skinny7878]

Thanks for the video brother! I've read how to do it on forums but I'm a "visual" guy so this video was perfect! This is what makes KZbin so great.

[@stlouissux9119]

Glad I could help!

[@JoeFlash1]

This is the repair that I will doing tonight on my 2005 GMC Safari. Thanks for posting.

[@MarkPdot]

I just finished this job. I ordered the linked kit. Delivered to my door in just a few days. Took me roughly two hours start to finish. Perfect video, perfect kit, near perfect job. Hardest part is removing the mount nuts. One thing I didn't look at before ordering the kit is that I had regular hex head bolts instead of the star head bolts so I didn't need the socket but that ok, I'll add it to the rest of my tools. Thanks!

[@stlouissux9119]

MarkPdot glad we could help! Sounds like you don’t have the original hydroboost is you had hex head bolts!

[@lonnieblackwell9215]

This is a very good video, straight to the point and informative. You do shouldn't have to show all the steps to doing it because if you couldn't figure some of it out on their own I would not think they should be doing this repair.

[@PhilJach]

Thanks for taking the time to make this. Exactly what I needed to fix my '02 Silverado 2500HD 4x4. And yes, stlouissux and is why I moved west. ;)

[@stlouissux9119]

Glad I could help!

[@manuelortiz5164]

OMG, didnt relize how simple that is. I can totally do this instead of buying a new booster.

[@stlouissux9119]

Glad we could help!

[@sebastianpulido569]

Great vid. I had issues removing 2 of the 4 nuts from break pedal area. Also, you glossed over how to remove the clip from the connector. That took me a while too

[@losteroni]

I was afraid if I took them out I might never get them back in but it really wasn't all that bad !

[@texasmexican127]

Thank you for the video I’m in the process of doing my 2003 2500 hd 👍🏽

[@scott06z71]

My hydroboost is leaking. Great video I'm getting ready to order the seals and fix mine. Question: I have an intermittent problem that brake pedal gets soft and goes almost to floor. This is intermittent. Can a leaking hydroboost cause soft brake pedal? Not loosing brake fluid.

[@MORIN1964J]

Great vid, no-nonsense and to the point. Well done.

[@stlouissux9119]

Thanks for the positive feedback!

[@robs.201]

I had my closed captioning on watching his video and at the six minute 50 second Mark while you were explaining how to bleed the the system by pumping the brakes it said "and we're going to repeat that process to my penis" instead of two more times. 🤣🤣🤣

[@stlouissux9119]

Unbelievable what technology does!

[@JoeFlash1]

All fixed. Thanks for posting the How to video.

[@ImNotUri]

Great video. I’ve had new hydroboost Installed that do the same thing. Good to know I can just replace the seal

[@stlouissux9119]

Right on

[@f8thntheos]

one of the most helpful "how to videos" for my LB7. you saved me money that i put towards a family vacation. thank you!

[@stlouissux9119]

Very glad we could help! Please give the video a thumbs up

[@jessenichols460]

Good video, easy repair. My seal was clearly damaged. Did anyone still experience a leak after making the repair? If so, what should my next step be?

[@philslb7908]

I’ve watched other KZbin videos where the brake pedal is held down while turning the wheel lock to lock. Would you mind explaining why you apply the brake after turning the wheel lock to lock? Not saying your method is wrong. Just figure there is a reason you bled the system the way you did. Thanks for the great video!

[@jaredcarr1867]

Because the hydroboost receive it power from the brake master cylinder 😊

[@revoltingone5195]

Just fixed mine. You saved me lots of $. Not homo but i love you.

[@stlouissux9119]

Glad you got it going!

[@kevinwest3689]

I to think it was a well-made video, I'm not quite sure what the bleeding procedure you mentioned was? Can you explain for me if you have the time.

[@stlouissux9119]

Yes its to get the air out of the lines

[@kevinwest3689]

😂 dude! I was born in the 60s.I know what bleeding is. I was asking (2 years ago)🤣 What your process was for bleeding it. I watched again. I see what. You're calling bleeding. Good job👍 thanks I needed that- shoo-wee😁

[@armancha23]

Awesome and straight to the point!!!

[@bossbusa]

Great video in 7mins. Have you got a link to a video for the job done while still installed on firewall? Or some instructions to watch incl. tips to avoid. Considering trying it onboard. Thanks!

[@stlouissux9119]

Sorry, we don't have a video detailing the install on the vehicle (we always remove the booster).

[@TheMitchellWayne]

very helpful video, thank you!

[@stlouissux9119]

Glad I could help!

[@crazcougg961]

Great video, thanks for the help!!!

[@stlouissux9119]

Glad it helped!

[@peemee3011]

I have a 1999 K2500 Suburban with leaky hydroboost. I have ordered 3 piece seal kit. Most of my leak comes from where the figure 8 seal is. I've watched several videos where only seals are replaced so why don't you take it apart from under the hood instead of from inside? Seems quicker and easier if taken apart at 5 bolts under the hood. I would appreciate your thoughts on this, thanks

[@allenweberg353]

Thanks for the video guys! I completed everything but now my brakes are hard (literally have to push with all my strength to come to a complete stop). Any ideas? Brakes were fine before changing the hydroboost seals.

[@stlouissux9119]

Did you install it the correct way?

[@napualanihosea9972]

Did you fixed it

[@dirtrulz112]

I just replace the steering box and the powersterring pump along with lines and pitman arm because of a crack in steering box and a leak from back of ps pump. And after replacing and turning wheel lock to like 4-5 times the shutting off and topping of fluid it still whines, and when I use my brakes it will lock the steering wheel in its current position. Going to try and bleed the way you described in video in the morning.

[@mega-hb4re]

dirtrulz112 you have to use a hand vacuum pump at 20 psi when you first installed everything otherwise you'll break something with so much air pressure on the system. With vehicle off ignition on put the vacuum on the power steering and vehicle off the ground turn wheels left to right with out looking it , and checking the fluid level after a few tries and top it off as needed eventually you'll see air bubbles coming with the fluid . once you see fluid only then you are good to go. at that point turn engine on and let it idle for 2 minutes, then check fluid again but this time on the hit mark. you'll have a little noise for about 2 weeks but it will go away. these guys were bleeding the hydro system not what you did.

[@stlouissux9119]

Good advice thanks

[@tammy3099]

I have a problem with my2003chevy2500hd it has the6.0 motor . It was making a noise and hard to drive and stop so went and replaced the power steering pump it was just as bad if not worst so got a used hydrobooster off a 2013 everything looked the same so I but on still just as bad been driving it finally parked it been pulling my hair out I tryed to bleed the system some like but not exactly no help. I'm wondering if I still have air in my system and how to get it out

[@losteroni]

One job I sure wouldn't want to have to do twice !

[@Shadow-wq6rg]

My 2006 1500 Chevy avalanche has a hydroboost but O'Reilly's and Autozone can't find the gaskets in there system

[@RingerOFDeath]

thanks for the video. have the exact same issue, plan to replace seal this weekend. will let you know how it turns out!

[@stlouissux9119]

How did it go?

[@antiquecannons]

Question can you just get the master cylinder out of the way and then pull the part off and not remove the section on the firewall?

[@stlouissux9119]

Some have had luck doing it this way.

[@ThePasta22]

Great question! I'd rather not mess with the brake pedal and firewall if I can replace the seals while still mounted.

[@ClutchKickerNation]

did this any idea why the boost is applying brakes as soon as i start the truck? at first i thought i didnt engadge the piston into the grove on the actuator took it apart checked that all good still doing it. start trucks brake peddles goes to floor turn truck off and it comes back up

[@usmcdemoss]

Is there a way to swap out the pedal rods? I ordered a reman unit for my 2006 duramax and the pedal rod is 3/4” shorter on the new unit, therefore I have no brakes. I don’t have the receipt to return because I was working out of town when the unit came in the mail months ago

[@Ken-un9fd]

Hi, at about 4:34 you see a small valve with three holes in it that is flush with the half of the hydroboost. What parts are inside that?? i seem to have a small metal cylinder shaped piece which is behind the valve. they came out but i'm not sure if more than just the two pieces go in there. I Maybe missing something? 2005 Escalade. It does not have the plastic insert with the ball bearing inside or the small plunger inside the valve, like the parts kit and a few videos show... Can you help? I can send a picture.

[@justinwiltshire9433]

Could you possibly tell me which line would be rubbing on the innercooler pipe? They are rubbing a hole in each other. I want to fix that line. Just not sure which one it is.

[@jwookster]

Awesome video, short, sweet, and to the point. Can I link your video to mine? It's got some tips, not another how to.

[@brandofalcon]

Thinking of trying this today. How long to do this gasket change out? I have a 2004.5 LLY. I assume same O-ring as the for the LB7's?

[@stlouissux9119]

Should be the same O-ring. It will take 1-2 hours depending on how fast you move. Took me about 2 hours but was filming at the same time. To do it over again it would probably be about an hour.

[@brianfeltner7061]

I have been searching all over can not find the seal kit

[@MrJustdoittoit]

Did u have replace the seal that go between the master cylinder and the brake booster too?

[@stlouissux9119]

Typically not needed

[@jamewilson4724]

I have a question on 2008 Silverado HD 6.6 it started to make noise from the power steering pressure line and brake pedal pulsates Wen I Apply it steering will wen turning make a bad noise like it has air in it do you recommend replace p/s pump and hydro booster As well or just pump thank you for your time

[@stlouissux9119]

Sorry, can you explain the situation a bit more?

[@adamfavors5426]

the bleeding process, was the starting the vehicle and turning the wheel then pumping the brakes?

[@stlouissux9119]

Turn the vehicle off. Pump the brake. Start the vehicle. Turn the wheel all the way to the left, all the way to the right. Shut off. Pump brake. Repeat.

[@tammy3099]

Have 2003 Chevrolet 2500 HD replaced power steering pump cuz it was making a noise and it was hard to steer and stop after I replaced it seemed worse so replace the hydro booster with a used one off of 2013 everything looks the same now still has same problems wondering if I can still have air in the system it still makes terrible racket almost impossible to steer and to stop how can I get the air out of it if that's what's wrong with it

[@josephfordham6432]

Just ordered the seal because my hydro booster was seeping power steering fluid at the same place where you split the unit in half. I assume this seal should fix my problem or do you think I may need that figure 8 looking seal also. thanks

[@stlouissux9119]

The figure 8 seal almost never causes the leak. If it's leaking between the master cylinder and the hydroboost it's the seal from the video. The only time it would be the figure 8 is if it is leaking all the way back against the firewall as the figure 8 seal is what seals the two halves of the hydroboost. Again, very rare that it's that one.

[@josephfordham6432]

Curious because i have fluid that has seeped inside of vehicle above brake pedal. Noticed seepage also at the half where you separate booster in your video. Its located just on other side of gas cylinder towards firewall, tgats why I am wondering if it may also be figure 8 seal,its leaking there. What do you think?

[@stlouissux9119]

If it is leaking between the two halves you likely need the figure 8 seal too.

[@josephfordham6432]

Any idea where I can get the figure 8 seal without purchasing the entire kit. Thanks

[@stlouissux9119]

Sorry I think you will need the whole kit.

[@skbarrow65]

After replacing power steering pump, I have a brake problem. When I step on the pedal, it pops up but then I can depress it and they work properly. But it pops everytime I step on it. It feels like the anti locks are starting to come on each time. Could there be air in hydroboost?

[@stlouissux9119]

Try bleeding it per the procedure in the video.

[@miketodd7466]

I have power steering fluid inside the cab running down the inside of the firewall is that from the seal

[@stlouissux9119]

No

[@HMA36]

Thanks.

[@johnjbieble4444]

i like the video , thanks but my power steering pump dosen;t have a fill cap do i have the same unit ?

[@stlouissux9119]

+johnj bieble What's the year, make, & model of your vehicle?

[@johnjbieble4444]

oh i was out in left field i have a 2000 chevy express van 1 ton 5.7 L. hydro boost is leaking, and the pump is shot.

[@stlouissux9119]

That should have a resovoir. If you can't find it I can provide some documentation on the location.

[@johnjbieble4444]

its mounted on the fire wall above the hydro boost and master cyl. thanks for the shout i got confused when i saw the fill cap in the vid

[@damxgopak457]

Can you just unbolt it at the star bolts and pull it apart and deal with it without removing the under dash stuff?

[@stlouissux9119]

It's much more difficult, but you can do it that way

[@bluethunder2068]

Do I need to drain the oil in the brake oil and the steering wheel oil?

[@2jetskis]

I have an issue that you may be able to shed some light on.... I bought a used '06 yukon denali XL with GM SPO codes JF4, JH2 and JL4. Since the day I purchased it, the brake pedal has had an instant single kick-back if I hit the brakes fast and hard -(like someone pulls out in front of you type braking). I have replaced and bled all four calipers, replaced and bled the master cylinder, removed the fuse for the ABS system-then replaced it after testing....still single-kicks the same each time the brakes are depressed in this way. (I live in Mid-Michigan and definitely know when the ABS is activating.) It does not kick back during normal braking. There are currently no brake related codes to read. (Current codes are related to ride control, tire monitor and air bag.) Any thoughts? Questions?

[@stlouissux9119]

Sounds like an ABS issue, but it could be a bad hydroboost if you already ruled that out.

[@2jetskis]

I thank you for the reply. It helps to know that I'm not going insane....

[@flenbo76]

I have the same issue on an 04 Silverado 2500HD....Its a significant kick back and then it feels like you have stopping power

[@hectordeanda9133]

Did you ever find the fix for the brake pedal kick back issue? I have the exact same symptom. If I brake normal, everything functions as it should but when you hit the pedal quickly there's a split second kickback. I think I heard in another video it can be the hydroboost accumulator? Which at that point you'd have to replace the whole HB unit...

[@2jetskis]

I found a video that shows how to swap in a 2011 model HBoost unit which is less expensive that the '06 and I'm going to try it. Just been busy fixing multiple '05 Duramax transfer-case issues. Should be soon, though. Will post here with results.

[@alantenorio3911]

Is it the same part and proses for a 2002 escalade ext???

[@mattshobbies]

Can you do this without pulling the hydroboost off the firewall?

[@stlouissux9119]

I have heard of people doing this, but I wouldn't reccommend it as there's a lot to go wrong doing it like that. It should only take an additional 30 minutes to do the repair removing it.

[@19elmorrito]

I have a question repair kit is the same for the disel and for the tahoe or is it different I have an 04 tahoe and it has a leak

[@stlouissux9119]

Should be the same.

[@stlouissux9119]

Link to Seal: boostautoparts.com/products/gm-hydroboost-seals-final?DIY%20GM%20Hydroboost&Comment&KZbin

[@vincentlimon1123]

the question I have is do you think that my ABS light is on because my hydraulic brake booster is leaking

[@MarkPdot]

vincent limon No this leak is not linked to the ABS. The most likely cause of an ABS light would be the sensors at your hubs of each wheel.

[@Da9Panda]

How do u prevent it from pinching the seal I already did it twice and keeps pinching it so it leaks again

[@stlouissux9119]

+David Conde Which seal are you referencing?

[@KeepThePiece1776]

@@stlouissux9119 I think he's referring to the round inner seal; the one that started this whole project to begin with. I, too, am having the same issue. Can't seem to mate them together without it crushing the new seal causing it to leak again. Even tightened the bolts in a star pattern very gradually only to have it tear the new seal.

[@abigaillewis9837]

Question should i get one from a junk yard or new one trying to figure out

[@stlouissux9119]

This video should allow you to repair your existing hydro boost.

[@jordanbeaderstadt9531]

do you have a link for a whole kit for an 03 6.0?

[@MrMn2k11]

Could this hydroboost leak be mistaken for a rack and pinion leak I'm leaking a little power steering fluid on my 07 tahoe and can't pin point from where and I don't have a uv light for the dye test any tips or suggestions will be greatly appreciated

[@stlouissux9119]

It is certainly possible depending on how it is dripping. You should be able to see some wet areas on the hydroboost if it's leaking.

[@MrMn2k11]

@@stlouissux9119 Thanks for the pointers

[@BShandyman]

Could you do that without taking it off the firewall?

[@stlouissux9119]

It's more difficult but feasible.

[@rmarquez1325]

I have a 2001 2500hd. I have a very soft pedal with the truck off. I can pump the brake pedal and it sinks to the floor. I have replaced the master cylinder but i still get a soft pedal when the truck is not on. Could it be the hydroboost unit?

[@stlouissux9119]

Did you bench bleed the master before install?

[@rmarquez1325]

Yes. And I also had the brakes bled.

[@tylek13]

When you buy the hydroboost you still have to use the rod with the little disc on it, the spring and the round spider like thing with the hole in the middle that keeps the rod centered, from your original booster. The rod pushes out from the end of the hydroboost into the brake booster when you push the brake. That will settle your sinking petal.

[@veronicaamador3080]

I did what you show in the video on my 03 denali but my brakes are stuck all they way down and my truck dont move I need help please

[@stlouissux9119]

Sounds like you assembled it incorrectly, I recommend opening it back up and being very careful to ensure everything's seated correctly.

[@delo4real]

Why do you have to pull the whole hydroboost to fix it? It looks like you could take the 4 inverse star keys and fix the problem.

[@stlouissux9119]

It is a bit more difficult to do it on the truck, but you can do it that way if you'd like.

[@bryantace4463]

Did you lose any brake fluid while doing this?

[@stlouissux9119]

No, just some power steering fluid.

[@marisahuerta28]

if I'm getting bad vibration by moving the steering wheel and pushing the brake pedal can that be a bad hydroboost unit

[@stlouissux9119]

+Cesar Garcia Absolutely. Check your powersteering fluid too.

[@marisahuerta28]

Ok thanks

[@workingman1003]

Will this seal work on any GM truck with Hydroboost?

[@stlouissux9119]

Yes; boostautoparts.com/products/gm-hydroboost-seals-final?variant=53381952263

[@BillyJackIII]

Okay so I took my hydroboost apart and replaced the seals, but when assembling the hydroboost back together it was giving me problems and wouldn’t come all the way together! I tried At it for minutes on end and it would still have an inch or so gap in between both parts of the hydroboost. So I went ahead and made sure everything was where it needed to be, and then I put the bolts in (hand tightened) and drilled them in a star pattern! That was the only way I could get my hydroboost to come together. I finished assembling it and reinstalled and now two days later I’m having this hissing noise coming from under the dash when I turn my steering wheel left or right. Does anyone have any tips they can share on what the problem is or if I shouldn’t have put the hydroboost together that way. It’d be a lot of help! Thanks

[@BillyJackIII]

I know I’m a year late on this comment lol but any help would be amazing right now!

[@MilAmores777]

Do you bleed it with the cap on or off?

[@stlouissux9119]

Either way is okay.

[@jayaguilar8253]

What’s the name of the 2 lines that are connected to the hydro booster

[@stlouissux9119]

Inlet outlet

[@damiensanders9252]

The clip, genuinely so hard😂

[@EPTFaith]

What is that seal called autozone and o'Reilly cant find it on thier system

[@stlouissux9119]

Parts stores don't stock it. You can get it here: boostautoparts.com/products/gm-hydroboost-seals-final?DIY%20GM%20Hydroboost&Comment&KZbin

[@jamesphillips1175]

What brand and where do you order rebuild kit for it?

[@stlouissux9119]

boostautoparts.com/products/gm-hydroboost-seals-final?DIY%20GM%20Hydroboost&Comment&KZbin

[@jamesphillips1175]

@@stlouissux9119 I found link in someone else's question, bought 2 sets only 2 pieces in each set 58.00

[@travelinthru9519]

What should I expect to pay someone to remove and install one?

[@stlouissux9119]

1-2 hours of labor plus the cost of the part.

[@vicreyes9237]

Is this the same seal for a 2005 Yukon xl denali?

[@stlouissux9119]

Yes

[@emmbeemeeapparel2046]

Thanx again, doing this job tomorrow morning.

[@gwennasmith6298]

I still have a small leak from same place any suggestions ?

[@stlouissux9119]

+Gwenna Smith There's a chance the grove the seal sits in is damaged therefore you may need a new unit. Are you sure you put the seal in facing the correct direction?

[@chadclark5874]

Mine also leaks after doing this procedure (which I really appreciate you posting). There's probably a lot of possibilities as to the leak source... but ask, does it just make sense to get a rebuilt HB rather than unistall/reinstall seals? I'm a home mechanic and haven't tried the UV die yet...

[@miguelreinares4187]

What is the name of the part and where can I order it ? Thanks

[@flintbarnes9291]

i have bubbles in my power steering pump fill hole. That mean anything?

[@stlouissux9119]

That sounds fairly normal, you will have some bubbles from the return of the fluid. You may try bleeding it as outlined in this video.

[@waffenbear117]

I have a 2007 2500hd would the parts be in the same place?

[@stlouissux9119]

Yes they would be.

[@waffenbear117]

DIYAUTOMOTIVE thanks

[@stlouissux9119]

No problem

[@lezzlove4841]

I ordered my parts online. I have a 2005 chevy tahoe 4x4. Want to change all the rubber and metal parts in the hydro booster. Would it be the same process and would same parts on your video work? Thank you

[@stlouissux9119]

Same process; here's the parts for your Tahoe: boostautoparts.com/products/gm-hydroboost-seals-final?variant=53381952263

[@moneypitpullingteam6235]

Do i have to remove the whole thing just to get that one gasket causen the weep hole to leak?

[@stlouissux9119]

It is much easier

[@georgehensley9487]

where to buy seal

[@pontoonfun7620]

so I put everything back together and when I start truck up the brake pedal goes right to the floor by its self then when I turn wheel right and left the brake pedal pushes down more

[@IdahoAllstars]

+George Smith IV i just did mine and the brake pedal is on the floor too. what did you do?

[@stlouissux9119]

+Ashlee Stone +George Smith IV Did you properly bleed the system as outlined in the video?

[@gavinwallace6250]

I had the same issue. Attempted to bleed the system as described, but the pedal still goes to the floor. Did anyone get this issue resolved?

[@stlouissux9119]

Are you ensure all of the seals were installed the correct direction? They can only be installed one way. If it didn't do it before you took it apart (was just leaking) you must have messed up a seal.

[@gavinwallace6250]

Thanks for the reply. I did install the seal correctly, but damaged it upon re-assembly of the Hydroboost halves. It wasn't leaking after reinstalling it, but I believe the problem of the pedal going straight to the floor was the linkage to the spool valve was not connected properly. Since it doesn't just fall into place you have to make certain that it is held in place as the halves go back together. Glad I bought two seals before I started the project. 2nd try was successful and has been working fine for over a week now. No leaks.

[@EdgarHernandez-eb3xv]

How do I ask for that part at the store??

[@stlouissux9119]

Parts stores don't carry it; I linked where you can get it in the description.

[@cronitos73]

do we need to remo5the pedal ?

[@stlouissux9119]

+mario velona I didn't have to, you're able to work around it.

[@joser26961]

Does it work the same for a chevy astro 1997

[@stlouissux9119]

Yes, very similar concept.

[@writtenpieceopaper1]

Would this work with a 2009?

[@stlouissux9119]

Yes

[@derekcody6134]

I have a 2000 gmc 3500 we put a new line in now how do u bleed it someone help

[@stlouissux9119]

It has directions near the end of this video

[@MarkPdot]

Erik Channel Yes.

[@rojodeleon88ify]

can you tell me the number for the seal for my power bake booster so i can order to ebay please

[@rojodeleon88ify]

is for my 2003 chevy silverado 2500 hd 6.0 engine

[@theSword-]

Why is it that on my 2003 6.0 chevy truck, the brakes start to lock up after about 10 minutes of driving? I have replaced the master cylinder and it still does it, but only after about the 10 minute driving time. All 4 discs at super hot and they will only let go if I open the bleeder ports to relieve pressure, then the process will repeat.

[@stlouissux9119]

You might try checking your ABS module.

[@excelnprevail]

MGTOW SWORD maybe the rod that pushes into the master cylinder from brake boost has a negative clearance giving it a push at all times... might need to be adjusted

[@dereksedlacek7563]

part number for the seal?

[@stlouissux9119]

boostautoparts.com/products/gm-hydroboost-seals-final?DIY%20GM%20Hydroboost&Comment&KZbin

[@chriscruz5199]

where can I get the seal kit?

[@chriscruz5199]

DIYAUTOMOTIVE thank you! I ordered it.

[@csmith6237]

Hey where did you get it from? I don't see the answer

[@austinschevelle1980]

Great video. Thanks a lot for posting it. I was doing my 99 Silverado and unfortunately I had to replace the star washer cause it broke when I tried to pull it out. I got the whole kit here: www.ebay.com/itm/GM-2771004-Hydro-Boost-Seal-Repair-Kit-Exact-Duplicate-Complete-Seal-Kit-/200949312875?vxp=mtr&hash=item2ec9832d6b Also I found it really helpful to take photos as I was taking it apart so I could match up the seals and the orientation that I took them out of as without the pictures I would have been lost on how to put them back in. I would have had to buy 2 kits if I hadn't purchased the complete kit with the star washer. Autozone didn't carry it and the dealer laughed when I called them to see if they had it in stock. I also replaced the yellow check valve even though I couldn't tell if it was faulty or not but it came in the kit so I replaced it

[@stlouissux9119]

Thanks for the positive feedback!

[@johnnyrizzo8057]

Good video. gotta love GM junk

[@stlouissux9119]

Thanks for the positive feedback Johnny!

[@3383porras]

where doni get the seal?

[@stlouissux9119]

www.ebay.com/itm/-/322283865028?

[@pontoonfun7620]

I went out and bought a master cylinda and its the seal

[@jimavil5395]

I pushed the pedal and it stud pushed in it did not come back up and I replace the hole hydro bust

[@jimavil5395]

Any help

[@stlouissux9119]

Not quite understanding the question. Did you replace the entire hydroboost, or just the seal? If you had the hydroboost apart take special note of 4:46 as it's more than likely the issue.

[@jimavil5395]

Thanks a lot keep up the good work

[@jimavil5395]

I fix it and everything is working good now 👍

[@stlouissux9119]

What was the issue?

[@eastpaloaltosfinest]

damn, i just bought a whole new booster... not installed yet

[@stlouissux9119]

Sounds like you should try and rebuild yours first!

[@bwells889]

I just installed the hydro booster on my truck today but I still don't have breaks when I press on the peddle it wont come back up any help would be appreciated thanks

[@stlouissux9119]

Were the brakes working properly before? Sounds like you either have the linkages hooked up wrong, or have air in your braking system (possibly a bad master cylinder but would need more information).

[@bwells889]

I found out the problem when I ordered the new booster it didn't come with the spring and rod so I had to get the spring and rod from my old one and put it in the new one so I have brakes again thanks anyways for trying to help

[@drewhill8910]

Half past tight

[@brandondoyle2061]

Decent video, but the audio was bad.

[@stlouissux9119]

Sorry about the audio