The part Mr. Campbell is showing at 2:32 is probably AC Delco 12594578 PCV Valve Tubing. The other hose he describes at 5:00 is AC Delco W0133-2574218 which connects at one end to the PCV valve located on the valve cover next to the firewall. Hope this helps someone.

After I watched I wrapped that hose with electricians tape to see if there was a vacuum leak. Didn't fix it, But I followed your lead thinking "simple" and replaced the Vapor Canister Purge Valve ($20 on Amazon) and voila! No more stabilitrak /traction control off warnings & no more "lean conditions" reported. As an old mechanic told me decades ago - start with the cheapest before you tackle the most expensive. Thanks for this video!

There's LOTS of videos describing this problem. This is the MOST concise and time saving. Apparently, there is a service bulletin for drilling the TOP HOLE of the PCV valve itself with a 7/64 drill bit and the 2 LOWER HOLES with a 5/64 drill bit. This is proclaimed to improve performance long term after a thorough cleaning/de-varnishing of the PCV valve itself. There are other consequences to this problem: The first is gunk contamination. There is reportedly a service bulletin to remove the valve covers and clean the top of the head with brake cleaner, because an inlet (Venturi?) restricts flow. Many sensors become clogged and will throw codes: vvt sensors, crank/cam position sensors, vacuum canister etc. *Check/clean these before letting the shop swap them out. Be sure to demand the old sensors back before they start and PROVE the parts are bad. They can be checked; the part swappers will be less inclined to gouge you. 2007 Saturn Outlook, 185000km (110 000mi) De Gunk 3x @ 175/180/185km Replaced Brake Pedal sensor (fail) Cleaned MAF/ throttle body (temporary success) and removed lots of oil/condensation from breather intake. (I also noticed that the problem is exacerbated when the crankcase is more full of oil/ after oil changes and recurs when the temperature drops below 0ºC/32ºF) -Will be removing/ drilling PCV. If fail then cleaning/replacing the sensors if necessary. Dave, smart to use a laser pointer and stay to the point. Thanks

Dec 5th, 2019. I am at work and wife just called me...all these lights (engine, stabilitrak, no traction, stop engine) came on. AAA on it's way....These are the first things I will check on our 07 Acadia...I believe you just saved me tons $$$....THANK YOU.

Hey David,you were spot on with that fix,I too had the same problem last year as I also own a 2008 Buick Enclave,also I replaced that small hose going from the cover to the hose going into the mass air flow sensor which I cleaned also,i also cleaned the throttle body too and my vehicle run perfectly up until last week and I think the problem is that long tube running from the top of the engine going down to the pcv valve and that's the only thing I didn't clean or change last year everything else I did,so I have to thank you for posting this simple fix for the Enclave owners because the dealerships would charge you an arm and a leg to fix this issue

As a rule, any time there is oil getting in the air intake snorkel or the intake anywhere, that's unwanted. Unfortunately, as the engine wears and you get more blowby this will only get worse with mileage. I would recommend checking your intake snorkel at each oil change.

David, thank you for sharing your experiment. Taking car to mechanic is not less than 1800 dollars. Your fix is great and I have Buick Enclave 2013; had the same issue once and it went away. The mechanic who had replaced alternator two weeks ago told me it has a weird code 3020 or 2030 and told me I have to replace gas paddle with (has other stuff like sensor, transmitter etc) would cost me $150 for parts and $150 for two hours of labor. I was late that evening and decided to get it done on Monday. I believe I have to change the air filter also, and check those hoses and valves you showed here. I do not have any warnings any more but car is running like it is on low gear. Again, thank you for the tips you shared with us. I clicked "like" on your video. Thank you sir.

This definitely worked and saved me a lot of money taking it to a mechanic shop....thx a mill buddy

My 08 enclave was giving me code U0073 and telling me service stibilitrak/park aid off/traction control off, like you said start with the cheapest so I cleaned the 2 small hoses, the snorkel to the throttle body and the throttle body itself, so far no code and she's running like a top, thanks for posting this video and solving my problem, much appreciated.

Great way of explaining my 09 enclave is having same problem. Will look it up tomorrow

thanks for the post, I had a stabilitrak and traction error and also low engine pressure. I did everything you said and it works good now. I also put in a fuel additive because I think we had bad gas.

Good job explaining the PCV issue on these engines. I know the newr model style has a revised pcv system.

Just recently started having this issue with my 08, going to get that cleaner from AZ and pull it into the garage. Thanks for this.

ok....... its almost been one year now and my stability track control problem has still not returned. thanks for all the likes an i am glad to here all those great success storys.

Good one! I agree with David this should not make sense but vehicles are so interconnected I cannot say this works yet but based on his description (P0171/P0174) and solution we are definitely getting somewhere here. Thank you David!

good video, I was getting po171, po174 as well as co710 and c0561. Some readers may also want to check for a vacuum leak behind the steering pump reservoir, above the where the left rear spark plug is. There is a 1 inch metal line coming off the intake, that has a rubber stopper over it. If your not careful, when you change the rear spark plugs, and you reach around behind the intake on the left side. you can knock this plug off and give you a huge vacuum leak and hard downshifting. there is a video somewhere of how to find it.

I ve had the same problem for a while and I just ignored it.I have that same part on order because there was oil in the air duct . Hopefully that should fix the problem.I see you are doing the right things, another thing I am replacing is the Purge Valve.BTW mine is the same year as yours.

Good video with good advice. I cleaned all of my vacuum lines, cleaned and drilled out the PCV valve, but the problem persisted. Turned out to be a faulty throttle position sensor. Had to buy a new throttle body, but the problem went away and my 08 is running good again.

Thanks David. Going run through the three areas. 👌🏽🤙🏽👍🏽

I truly appreciate the long explination , step by step because i know mothing about cars .

“So took mine off…and I cleaned it” is my new line after any and everything now

I did the same thing on my Chevy traverse, the only thing I did different was that the “ pcv “ valve on the back of the engine was almost clogged up. And with a mechanic advice i just opened the 2 little holes 1-2 numbers bigger . Everything worked for 3-4years and today the Tection control acted up again. Time to clean up again

Thank you i will be buying the parts and cleaner my buick is doing the same 2008 .

I am so happy I saw this video, did exactly what you did... all codes cleared.

Spot on....i purchased a buick lucerne...and I had a combo issue....check engine and stabilitrak...brought it to a mechanic for an oil change...he found...oil leaks at bottom of car...and the wrong oil filter...replaced a but oil plug....and the check engine light disappeared...when I brought it to a buick place for repairs....they pulled codes and told me I needed to replace to egr valve and gasket...and really couldnt understand why until i fixed it

Thank you for posting this. I just paid a 1000 dollars and the mechanic did not fix the problem I took it back for the same issues. I even show him a recording to what is going on. He calls me back and said I need to replace my wiring harness which will cost me 1300 bucks.

im glad you all have had success as i have, as of today my buick is running like a top, the radio is going in and out but other than that as is still good. the problem has not returned

I’m just now having the same problem with my 2008 Saturn outlook so imma try this

This fixed my issue for my 08 enclave. I changed the o2 sensors but still had the codes pup up; A good cleaning and a new hose fixed my problems. Thank you!

I have an 08 Buick Enclave and I tell you this don't let the brake fluid get low cause the whole car will start acting funny. And that will come from just low brake fluid.

i have the exact same problem you have described, thanks for posting this, i will try your fixes this weekend.

That part is called a PCV orifice. That clog affects the throttle position sensor on the throttle body and for some reason throws that stability code. I recommend modding that orifice or cleaning it at oil changes. Also now that you have the clog removed I recommend digging in a little deeper to clean the oil build up out of your engine. Remove the throttle body and clean the throttle plate. There will be excessive oil residue on the back of it (do not manually move the throttle plate by hand it will throw the position sensor off). Also remove the upper plenum and clean the oil out of it also. The variable timing solenoid is mounted inside the plenum and is most likely soaked in oil. You will notice the better performance from your vehicle.

Man I just got dine replacing my ex wife's camshaft, crankshaft sensors and that piece where that last hose we were talking about is connected cause that's what the auto zone guy said the scanner read but still shakes real bad but tomorrow I'm getting a can of clean hopefully it works thanks

Outstanding explanation of MY problem! Thanks

Symptoms fit mine to a T, going to try this tomorrow

Awesome 09 same problems and codes..fixed and everythings good! Thank you for taking the time to share the information!

I had the same lean conditions. the mechanic did some work on my car and didn't put the boot back on properly. I cleaned the mass air control sensor and changed the silver part, throttle body that's what controls the air flow. no more hesitation. I'm here for stabilitrack. saw a you tube video that the brake sensor was part of that problem.

I’m going home to try this tonight!!! Thank you

thnx for the help, gonna chk it out on 08 saab 97x which is same as a trailblazer.

You may want to change them hoses, and the purge valve as well as they all are going to be junked up. Its literally 15 for the purge valve, 15 for the fitting, 15 for the hose, change the air filter, change your oil. Otherwise you're only checking the partial problem. It's all on Amazon for really cheap. This will take all the variables away and will have the car run more efficiently and be more reliable.

Good vid. You are missing your oil fill cap.

My vehicle is a 2008 GMC denali U conn and it's doing the exact same thing so hopefully what happened to your vehicle is similar to what happened in mind

as of today 10-23-18 the problem has yet to return this is good news

Very helpfull. Thanks for your time

thank you great vid.

You are a genius!

i have this problem now but after i changed my Sway Bar Links ... any ideas??

Thanks for the informative video. I had the oil in the tube between air box and throttle body. Cleaned the throttle body,intermediate hose, maf and those pcv pieces as well. Eliminated all of the codes and service stabilitrak code. Big thanks again!! 07 Saturn outlook. Codes P0103 p0122 p0223

Excellent, thank you.

Thankyou...

Dec 5th my traction stabilizer off notice and service message came on and kept coming on and off... Then it stopped until today Dec 10th so I'll have to try this coming weekend ! Thanks.

But come to find out....the oil leak gave me both problems....clean this like you said and no stabilitrak and check engine

Mine had a broken hose as well but it still needs a tune up I clean the mass air flow running better than it did not 100% tho

You're awesome. Thank you so much. I'm so frustrated!😂😂 gonna order those hoses and cool off the days they'll take to get here. I wanna drive the thing off a cliff.😂😂😂 but I will not. The fishes don't deserve that. 🎉😂

The stabiltrak went off because you changed the manifold pressure, the map sensor is working . a cracked cap on vacuums test port behind manifold will also trip the stabiltrak .

Thanks man. I gotta check out the girlfriends 2017 enclave. We have a service stabilitrak error on dash…with the “traction control light on” (traction off” ) also, when I give the car “more than normal” gas at takeoff it JOLTS like crazy , 3 chugs like your braking and accelerating at the same time. I’ll have to get in this as it just started yesterday. I DO NOT HAVE A CHECK ENGINE LIGHT though… hmm?

What the name of the first hose you replaced? That’s the part I need mine keeps coming off

This was so informative..my 08 is doing the same issue...would you know how many o2 sensors 08 enclave have

What did you use to clean the pvc? Carb cleaner?

Well I'm going to see what I can do myself again from last month. Now my Buick has. 203k miles now..

Hey David. Thanks for posting this. This worked on my car but unfortunately has returned after a couple months. When it first started their was oil collecting in my 2 inch hose between the carb and the MAF, today, I have notice oil again. Would you happen to know why and how oil is getting there?? I feel if I can solve the oil problem then this will be solved completely. I appreciate any opinions and help. Thanks.

Thank you

How Buick running now still good.

Mine was the brake pedal position sensor and problem solved same as 2011 gmc acadia

If recommend an oil catch can ;)

Does anyone know the name of the long tube??

Some of us tune in for the information and not the whining.

Do you happen to know where the service stability track sensor that can be replaced? Just cause I tried everything above per your video but the service stability track still popping up, maybe I can change it?? Thanks in advance.

Hi David, I own an 08 enclave 2wd. It randomly shuts off on me, no warning. I could be on a side street at 25 mph or highway at 70 mph!! Any thoughts?

Would love an update to know if the issues ever came back.

Great information! But could we have started this video at: Let's summerise what I've done here.....

Do you still have the truck

Is or was your ABS light illuminated as well as service stability track?

I did this and go away for a while and come back in a couple weeks

Dave you didn’t put the second video up befor an after mass sensor clean

Hasn't done anything for mine😔 done everything you mentioned still trying to figure it out

How did you get to that valve?

Mine will drive just fine then the door will start to lock and unlock while driving then will go high RPMs any ideas ?

Stabilitrac system is dummy light

I have 2014 Verano has the same problem my local dealer said it need transmission

Did It pull a little while drivin it?

I have the stabilitrak issue, but no more...you normally need to change the "brake position sensor"...It's under the dash, takes about 20 minutes to complete. The part is about $10. Has one screw, and an electrical connector. Watch this video!! kzfaq.info/get/bejne/Z9qoq5tl1bvUkYU.html

That will come on if you need all time and time battery dead going dead, losing power even the back windshield wiper will just come on on its own to warn you that something else is wrong with the car

Same problems in the 2013

Hello David did that problem ever come back or has it been gone since repairs

What’s the name of that part

I aligned my front end after struts put on and mine went away

My car keeps saying engine reduced power 🤦🏽‍♀️ and I don't know what else to do 😭😭😭 someone help me!!!!

The problem might be the missing oil cap :)

Holy shit does this guy drone on for 12 damn minutes????

Can you come fix mine 😕

This did not work on my car

Why does everyone take so long to get to point!!!!!🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️

Skip to 2:00 minute mark for relevant info.

😂😂😂😂😂😂 sa n' a aucun rapport à cette connerie que vous expliquer le control est sur les sensor des roues avant

This guy takes long to explain instead of getting to the point

I’m having horrible problems with my wife’s 2008 Buick. She barely is able to drive it and running the ac makes it worse. Great video and I will try the same as u did and hope I get it fixed! Thank u sir!!

TOO MUCH TALKING. GET TO THE POINT!!!!

Thank you