Chevrolet 1500: P0446 EVAP Vent Performance

[@anthonythompson4110]

This week we had a caddy in for a lean condition. I was scrolling through the data on the scanner and found that the mass air flow was only registering 3 grams per second. I distinctly remember in one of your videos that GMs.should be closer to 5.5. my coworker said it was fine. It bugged me. Sure enough, I looked it up in Mitchell and found that it should be 4-8 at idle. Tried cleaning it, the money light came back on,. co-worker was giggling. I checked the data again and still couldn't get but low 3's out of the mass air. Changed it, and like magic, the airflow grams went up, fuel trims corrected themselves and once drive cycle completed, I inspected it and shipped it. Thanks for the videos. I grew up spinning wrenches. After 11 years in the military, and 12 years in a mill, I got back into it and am constantly trying to educate myself. Thanks for your very informative videos. You help tremendously by not showing just the answer, but the diagnostic road to get there

[@wills.5762]

I have a '99 Silverado, and did the mass airflow, took it out for a quick rip and it was still runnin shitty. Money light wasnt on, but with OBD data the sensor was reporting exactly 3 (iirc) g/s, regardless if im sittin there or full send. Really threw me for a loop. So, I take it all apart, pull the airflow sensor out, clean it, have a goodly gander at it, put it all back together and walk away...and then realize for the second time, now, I've forgotten to plug the damn thing in

[@aparks5595]

Rule of thumb is 1 g/s per liter at idle, and if memory serves me, it’s based on a 600rpm idle at that

[@RyanHull76]

@@aparks5595 - That's exactly correct

[@pbau7769]

Would a mass aiflow sensor(p0101) trigger P0446 or PO449? I hav both the 101 & 449 on my OBD. Thanks

[@crisprtalk6963]

good story!

[@chandlerfoley4826]

Too bad everyone doesn’t diagnose like this. Too many people find a single issue and stop at that. What an excellent tech! Coming from a tech, these are the kind of people that should work on vehicles! Great job Eric!

[@Syzygist]

No criticism but just had to share ! I opened this to check on the authors views and comments ref. the P0446 Code. I immediately had to check to verify it wasn’t an episode from “The Red Green Show “! I suppose it’s the voice and manner of speaking. Good video learned and enjoyed at the same time! I especially liked watching you tap on the purge valve while the connector was responding to each tap! We all can to feel normal now! Unique for a technical video. Best to all! 2025 is a new year for all Americans and a special greeting to my brothers and sisters… “Welcome Home!”

[@chiniakwalker]

Great , I've replaced the one under the hood twice still had check engine light pop on reset truck many times and replace the one on the gas tank also still had same problem... But after seeing this part about the canister I decided to follow your steps and blowing into canister,, . Found the same problem you just showed almost identical gas run down my hand and into my sleeve . Never would have identified this problem with out you video ty .. ordered new canister should be in few days . 2003 Chevy Silverado 4x4 no telling how long it's been that way but I've had this truck 3yrs now and was only able to understand the problem ty again!

[@ChingoMandinguez]

This video was a tremendous help, been battling P0446 on my '05 GMC, and this really helped me understand the complete the system! THANK YOU!

[@NEUTRALDROP]

True professional put that window down 3/4! man I lost your message about doing a meet up you said you go to Staten Island would love to do that sometime in the future thanks for the shout-out man a lot of people said they came from your Channel from your recommendation!👊😁

[@williegillie5712]

The neutral drop guy. I still haven’t seen your videos. I’ll have to check out your channel.

[@NEUTRALDROP]

@@williegillie5712 what are you waiting for

[@aaronshensky9385]

@@NEUTRALDROP he's definitely missing out. One of my fav channels. What's it got STUNTMAAAAAN! WOW FOLKS WOOOOWWWW

[@SouthMainAuto]

@@aaronshensky9385 By far the best channel on KZbin! STUNNNTTTMAAANNNNN!!!!!

[@SouthMainAuto]

I'll shoot you another email cameraman

[@sumduma55]

I think it is awesome that you do not mind diagnosing the problem and letting the customer fix it themselves. I've seen shops act like you are taking food off their children's plate when you decide you want to do your own work. There have been times when I was too poor to pay attention. Not having a car to get to work would make things worse. Without a lot of diagnostic tools or the ability to fund a parts cannon, sometimes having a shop get you in the right direction was neccesarily the difference between paying rent and an endless cycle of cash advances and a hole that is very hard to stop digging.

[@jeremyhundley3142]

I can't be the only one going You didn't plug it in... You still haven't plugged it in.. Eric, plug it in!

[@johnaclark1]

It's always great to see the pros make the same silly mistakes the rest of us do. I don't know about everyone else but I prefer when these guys leave their mistakes in. I learn as much from their mistakes as from anything else.

[@davidca96]

I was gigglin' knowing hed finally realize it was unplugged. We all miss the easy stuff occasionally, I know I do! Tell you what though, some of the stuff ive seen him do on here I wish he was here in Michigan my truck would only go to him for everything.

[@kenrieve9711]

See how well he's teaching us, that was a pop quiz!

[@richardcranium5839]

ya ding dong

[@emmettthompson3332]

I saw the same thing. Thought, is there some magic going on here?

[@thomas000187]

Eric O.... I think I've watched every video you have ever made. I must say, you are basically the KZbin diagnostic god. Yeah there's others, but none that compare. Thanks for what you do. Your legacy will live in the minds of hundreds of thousands of people you have truly helped educate in this line of work. Ur an awesome guy Eric....

[@bobbyschroeder7068]

I am a technician as well, is it bad that I like watching somebody else fix stuff instead of me? Lol... Great vid as always

[@HouseCallAutoRepair]

It helps to add knowledge and experience... It also offer an often, new way/different way of doing some things. I love learning new "tricks" to speed up my diagnostics!

[@Dumbass_mechanic]

I'm also a technician, if I'm not fixing stuff I'm watching someone else fix stuff or else break stuff on youtube here. I've been wrenching for over 25 years and still learn things from Mr. O here. I also try to share some of my relevant experiences in the comments when I can

[@jaredstrehlein5605]

Its called Professional Development. Keep the mind in tune

[@neverstoplearning382]

Same here pals. Regards.

[@sparky72]

Means you’re management material!

[@brianpeters4486]

Lots of shops don't want to just diagnose. Shows what a good shop you are to work with the client in what they need. This is another reason you could up your diag only charge. Anyone with common sense would gladly pay to get accurate and honest diagnosis.

[@trryhin]

I was saying "uh, I think you forgot something" when you left it unplugged!!! Glad you didn't edit it out.

[@GC-kw1gq]

Not as bad as attaching an oil catch can to those connections. I did not catch any oil btw:(

[@jaredstrehlein5605]

Called "the honest mechanic" so few of them these days, but some still exist however. A sad fact in 2019.

[@KWsandman]

Going through SMA withdrawal but did get to see his brother (Doug) yesterday when he yanked my 10 wheeler out of the ditch. And now today a new vid, win!

[@vivillager]

Very important not to allow too much vacuum into the tank. I replaced a rusted out tank in a 1993 Chevy 6.5 Diesel, along with the fuel cap. I drove about 350 miles and stopped to refuel. When I tried to remove the cap (which is supposed to vent under vacuum), I ended up having to pry it off. The brand new tank that used to hold 32 gallons now only hold about 20.

[@65bugnut]

Good job mister O. We had the classic leaf blower, we were only missing the air compressor.

[@jonclark1288]

When I saw the thumbnail, I thought that was blood dribbling down your hand. Glad to see the Chivvy didn't bite ya!

[@ozzykrahn806]

Anybody who buys a gm is getting there head bitten off

[@7daystodieyeahbuddy919]

I wish BOSCH would make a scan tool I could connect to my WIFE to scan her and find out what is wrong with her? She is running pretty rough lately. Lots of backfires and squeaky noises. Life would so much easier.....Thanks for video Mr. O.

[@ralfie8801]

7 Days To Die YEAH BUDDY You don't know what's wrong with her? Maybe I can help. Women are all broken, every last one of them comes from Woman Manufacturing LLC broken, warranty voided, and they can't be fixed. There are no spare parts, they don't even get new parts when they are on the assembly line. That's why they all are broken when they come from the factory.

[@7daystodieyeahbuddy919]

​@@ralfie8801 Well that is news to me, No warranty? I did not know that? This should have been told to me BEFORE I married her. I thought maybe an eye exam would have fixed the issue. My wife can not see the **Check Engine** light when it came on. So now instead of a possible small fix to my car, I have to replace the entire engine. I am thinking of replacing her with a different model? Maybe I can try going gay? Are guys broken as well when they come out of the Men Manufacturing LLC? Thanks for the advice.

[@ralfie8801]

7 Days To Die YEAH BUDDY Well, I told you she was broken! As far as men go, I guess it depends on your perspective. Most of us didn’t come out if he manufacturing plant broken, but quite a few of us were broken after marrying a broken shemale without paying attention to the head on our shoulders instead of that other one.

[@gabrielmorales4612]

Soild joke

[@carlosolvera72]

In my 4 year automotive career I have learned way more about diag from your videos than the "training" I had at work.

[@Rik.B]

I love the fact you are just as enthusiastic about only doing a diagnosis as you are about actually getting the job. Here in the UK garages hate, and even refuse diagnostic only work. Only option a lot of the time is to hire a auto electrician who is mobile and charges three times what a garage would do per hour, or dealership who are extortionists as well. Your way are so refreshing. I check every day for your videos, after all these years, I still love get excited to see a new video posted.

[@georgebrandt6247]

That truck is pretty clean considering its age, mileage and location.

[@kevin9c1]

I bet he bought a high mileage low rust example from somewhere else. Good for him.

[@MichaelVictorious]

I was thinking the same thing. If I pulled a 2003 into my shop that was that clean I'd be buying lunch...lol

[@elmoz71ls15]

Probably bought from down south. My 2000 Silverado looks like that underneath here in Georgia

[@pauldavis5075]

OOOOH nice new lift. Feels good like a riding on a new set of tires. Have a great autumn day in new england, I am envious.

[@davidnielson5252]

You noticed that too. Saw those bright yellow arms and grey instead of blue towers and said, "somebody got themselves a new lift!" Bet Josh is happy.

[@twc20031985]

This video helped me figure out a similar problem on Similar Vehicle, but with different symptoms. About a month ago I tried to put gas in my 2005 Avalanche with the 5.3 flex fuel and the pump at the gas station kept kicking off like my filler neck was clogged, like maybe somebody tried to sugar my tank, and I got the check fuel cap display on the dash and a few evap codes. I pulled the filler neck it was clean. I pulled my line off at my purge valve at the Intake and a bunch of little black pellets fell out. I knew right away that was charcoal. So I pulled my canister down and took my cutoff wheel and cut a big hole in it. dumped out all of the charcoal, springs, pads and all of the other little bits in there out and wrapped it up with that aluminum really sticky tape for doing a/c ducts. blew out all of the lines, purge valve, and vent valve, and now I can put gas In my truck at the fastest pumps around without it kicking off, and the truck starts easier now, no check engine light, and no check fuel cap display. It didn't cost me a dime.

[@rjay1729]

Thanks! I have the exact same issue on my 05 snowstorm as well! 😎

[@twc20031985]

@@rjay1729 , you can either replace the canister or just gut it like i did.

[@holsterseven]

Love this stuff as I repair all my own GM vehicles. The older ones had more problems. Just did a no crank on my 05. Found it was a ground problem. Thanks so much for the vids.

[@davidtimmel4027]

Scotty Kilmer says to never go the next dollar while filling your gas tank once the pump handle clicks off. Don't put in a cent more. Overfilling will flood your charcoal cannister and mess up your purge valve. Good advice, I think.

[@doublestuf11-67]

I love watching ur videos because u always go the extra mile and look at the whole system step by step... scan tool first every time. 👍

[@floydervin2897]

eric o such a good guy always takin care of customers

[@jbrhel]

0:53 "Always risqué" in a Chevrolet"; priceless. I'm a newer sub and missed this one.Thanks!

[@mikebiron7339]

Man, I wish there was a new SMA video each day. How I luv me some good ol car fixin.

[@mikechiodetti6737]

I'm yelling "You didn't plug it in!" And laughing when you found it calling yourself a ding dong. STILL! Great Diag! Focused on and found the problem right away! The older GM and Ford systems like that one were fairly easy once you figured out how they worked. I forgot about the canister line to tank shut off valve in the tank. Good Show Mr. O! Thankyou. Oh ya, the stay here, don't move, Great Comedy Relief!

[@Thatswiftieofc13]

I have a 04 silverado 1500. I'm a truck driver so I decided I don't have time to be messing around with an almost 20year old truck. I replaced gas cap, canister and solenoid all at once. So far no return codes.

[@RandomPerson-su3xg]

My dad's '06 has the same issue. Replaced purge solenoid, canister vent solenoid, and tank pressure sensor. Even my Grandfathers '98 has a similar evap issue, which I hear is common on most years. The rust around the pump retainer ring is present like you said. I will attempt the canister test to see whether I need to replace it or drop the tank to fix the retainer clip/gasket. Thank you for the lead.

[@edwardquintero7704]

Watched the 2003 Chevy PO446 repair video. This mech is a professional that use diagnostic troubleshooting to confirm the truck malfunction. Informative demonstration to repair its problem. Bravo!!!

[@ethelryan257]

You didn't plug it in and you blew the Chevy. Eric, You are the best diagnostician in the industry, hands down. You also have found a way to leave my sides splitting with laughter. Thank you!

[@metoon3092]

Diagnosis and Testing,.You are such a rare Bird , in Today's Part slapping repair shops. As always, a Great Job.

[@comingundone27]

03 and the rockers are still in tact....Not bad. Also nice new lift!

[@rickfreeman9530]

Hey buddy your info always helps me out. Being an auto body tech I noticed the way you smacked on the purge valve. You ever thought of workin dents?? I thought I was the only one who forgot to plug things in. You were on a roll buddy! I just gotta give you a little crap!! Thanks for your helpful video's they really help me out on the mechanic side of things. From the Big Sky Country of Montana!! R.F.

[@mrdfarms9373]

Lawnmower guy, air Compressor and phone ringing.......it wouldn’t be South Main Auto on KZbin without any one of these three going on 👍

[@autotech2143]

Holy cow Dr O. I think you sent the cold weather down to TX. Woke up this morning and it's about 45-50°f. I needs to get my long Johns, coat, beanie, another layer of long sleeves, 2 or 3 pairs of socks, extra thick Dickies, and gloves. Also need to dust off the old heater of get a Kerosene jet heater. Great video by the way.

[@SurferJoe46]

I like it when you interact with your younger apprentice. Good rapport is important to attract good help. Being mean, contentious or short with them just discourages future techs, and we NEED new techs.

[@inhocsigno9151]

Very helpful esp the canister flow tests. My 2006 GMC Sierra calls the P0446 Evaporative Emission System Vent Control Circuit. I didn't know a code could have different definitions. Must have been changed in later models.

[@nandi0431]

Remember, "If he can do it, So can you" That goes for mistakes also guy's & gal's. Goes to show you that he is human. Just like the rest of us and makes simple mistakes to. Great job on explaining the process and the real difference between OEM & Aftermarket crap. People only see the price tag when buying parts these day's.

[@germanjesus]

If you have fuel in the canister then the fuel lines have been reversed. U made me howl about u trying to get the switch in the valve to work unplugged. Great vid

[@ring-and-run]

Every time I watch, I learn something new! Thanks for the insights.

[@boondocker7964]

Eric you are a vehicle brain surgeon, sorta, kinda. I is amazed by Josh and you.

[@SimpleElectronics]

We have these issues on CRVs when customers try to squeeze more fuel into their tank after the pump clicks off, the fuel gets in and eats the sponge filter that keeps the charcoal in and little tiny bits of charcoal get sucked into the purge and blocks it open. We have to replace the canister, the purge valve and blow out the line in-between. Hope it was worth it to hit 50$ exactly on the pump!

[@adamtrombino106]

Nice and easy, quick and sleazy test. I have to agree that the stuck purge sol most likely sucked raw fuel into the canister. Either that or the guy is prone to overfilling the tank... Nice vid!

[@stacydornan9765]

You need to teach at a college or university BRO.Your an awesome teacher with patience, god bless Eric

[@scurfie2343]

Lawnmower guy!! You know he sees you with the camera and fires up his mower.

[@montestu5502]

Lawnmower guy getting in all he can before the snow flies.

[@chrissmith6563]

And then the snowblower comes out.

[@montestu5502]

Chris Smith - Right! There is no escaping the noise!

[@stacyreese7341]

Good info I have evap high pressure and small leak show on my little cheap code reader I use on my Colorado and my Buick for years and looked at replace evac system but they ain't cheap I'm guessing if situation dictates I may be able to change the canister alone at not the whole system or am I thinking wrong

[@Aaron86v]

Funny timing, i have an 2006 gmc sierra (basically same truck) and had this issue a year ago. I had my entire fuel tank replaced, fuel lines cleaned and replaced the purge valve and gas cap myself. Problem went away but dont know what worked lol.

[@BigBadJones]

I'm working on this exact issue. P0446 and sucking when I open the gas cap. Watching your videos and I'm wishing I had a scan tool like yours

[@johnerway7255]

Eric, it's good to see, we all can watch you forget to plug the purge sol back in, lol, great to see your normal, every once in a while!!!! Your real guy, oh, yes I setting here watching, with me new South Main Auto shirt on. Thanks for a great vides, again.

[@johndondero8619]

I’ve watched a lot of your videos. Love that your a great family guy and your videos show you are an expert in the field. Tx for helping me learn on stuff. 👍

[@tonychandler8908]

You have helped me so much to understand the systems on these vehicles keep up the great work

[@acurarsx1195]

Same truck, new vent valve solenoid (bench tested), new purge valve (bench tested), new fuel pressure sensor.... but I am not getting any vacuum to the tank (after driving for some time, there is no "hiss" sound when I take off the gas cap). I have a code P0446 as well. Any ideas on he possible issue?

[@scottshelton318]

You are the best. Keep it up. Your family has to be proud of you for the knowledge, and the time it takes to make theses videos.

[@frankoch1]

I overfilled my Silverado 15000 fuel tank and ended up with the Canaster issue you just featured.... after I replace both solenoids because they were inexpensive to swap. Full load parts cannon fired -since I did replace the fuel pump also

[@aroundlinemen]

Do you have a test for tank pressure sensor? Thanks

[@billdoell990]

Thanks for info. Love the president, you mention. Miss him.

[@Ireland-bc2gx]

Eric o honest as the day is long great mechanic, great vids

[@gushamilton5188]

oddly I don't even have this problem and I was still watching.

[@birdiemomcarol6554]

I have a 2003 Chevy Silverado 1500 with only 68,000 miles with a code p0446. Checked the gas cap, used a code reader and reset/erased code and engine light went off. Drove down the street and came back on. So…any ideas? Thanks

[@BillaBong1]

I been trying to find out what that purge solenoid for a long while now till this video. Thanks a bunch!!! Now i can go get me a new one. My brother ended cutting the tube off of it also so now im looking for that too. Can you send me in the right direction on getting one?

[@cerwin21]

Never knew that about filling up while running. Learnt somethin new today

[@billydog1512]

I have a 2003 Chevy Silverado how many amps is the fuel pump supposed be

[@kevinbarry71]

Finally! Going through serious withdrawal over here.

[@2trkpony471]

I think he was out hunting Bambi's Mother or father?

[@chrisschultz6541]

Was hoping it wasn't due to a family issue. But just an operator error. Phew...

[@kellyconstenius676]

Me too. I did not believe I was an addict. But then I noted.. Its been 5 days!!! ARGGGGGGGGGGGG!!! " Hi My name is Kelly and I am an addict. And its been 5 days since my last fix."

[@2trkpony471]

Perhaps Eric ran out of "the good stuff" or wait for it,,,, brake cleaner?

[@philipallard8026]

Hope the deer hunt went well. Glad you are back

[@blueelectricfusion]

I have the same truck. would an evap system failure cause misfires and backfires? the engine checks out fine on a vac/compression test and all new ignition that tests ok. tech w/ snapon zeus said everything is perfect on engine data. getting p0445 and general misfies on the computer. chasing a ghost here -.-

[@daviddelle774]

Thank You, Thank You, Thank You!! I was honestly going into SMA withdraws!!

[@simonjakala2046]

Greetings from Finland, we have pretty strict emissions regulations here but The good thing about having american cars is that The inspectors dont know what they are looking at. For instans The evap system and the secondary air injection is totally irrelevant here, just extra weight. They only look at actual emissions from exhaust so for my96 and up a cat it basiclly a must. Keep up The Great vidjeos

[@brianandcindy1]

What's the name of the diagnostic tool you were using?

[@fastsmogr]

Great video sir. Love the commentary you sound like the sort I could sit and have a drink with. thanks for guiding us through.

[@CopCat34]

Great video. Multiple issues are hard to diagnose. Thanks for showing how to follow a multiple issue job.

[@lonwillis783]

Thank You Eric Great tip PLEASE DO NOT OVERFILL AT THE GAS PUMP WHEN IT SHUTS OFF YOUR DONE!

[@eldonerc2524]

But I need that last 49 cents to make it an even $40.

[@lonwillis783]

@@eldonerc2524 dont look at the pump when you fill it to not fulfill your OCD LOL

[@danielhowiesr.2593]

I envy you "fill 'er up" types. Hell, I'm happy to get $20 worth!

[@ralfie8801]

Eldon Erc That last .49 cents worth isn't going to hurt it, that last $2.49 worth could hurt it though.

[@sparky1348]

I own a 2010 GMC Sierra, having a code show up for EVAP vapor canister. The dummy light only comes on when it has been raining or it is wet out. It's off right now. Because it is dry out, Do you have any advice?

[@on-site4094]

Great diagnosis with the scanner the vacuum test was old school 👍 lol thanks for sharing

[@waltersticht7653]

Yes the 446 code on a Chevy is maddening. My old 02 Impala used to keep throwing that code and I replaced all the EVAP parts except the canister which was an expensive part at the time. Traded the Impala in eventually....

[@jaydog7428]

New viewer..love your videos, spent my whole staycation relaxing and learning from your past videos.

[@christopherbradley5456]

Love watching your videos. Your sense of humor make working on cars interesting and fun......lol

[@darlacowsert1175]

I have a P0455. I’ve replaced gas cap, purge valve, then Evap canister and vent valve. Evap canister was full of gas. (Also still getting code after clearing) Question could the canister being full of gas have been caused my topping off? Or is it def a problem with my fuel pump? AND, should I have blown out the lines after replacing canister/valve? Could gas be/have been in the lines? Without doing a smoke test, only other thing I can guess is fuel pressure sensor. If I’m dropping the tank, I’m replacing all of it. Still running orig. 2005 Tahoe 270k miles. She’s a Beast!

[@Stephen-cr3sc]

If you have 10 minutes to spare, I’d appreciate some advice. I have a 2004 Honda Accord LX with an i-VTEC 2.4 DOHC SULEV engine. I’m aware it has a timing chain instead of a belt. This car has 118,000 miles and has only been driven in snow about a dozen times - to the best of my knowledge, never on a salted road. It has only lived in the San Francisco Bay Area and then central Oregon. I would say its condition is very good. It’s needed very little maintenance beyond oil changes (every 5000 or 6000 miles), a couple of batteries and a new starter about four years ago. Currently, the maintenance required light is on and has been for three years, but I’m retired and only drive 1000 miles a year. I only fill the tank 3 times a year. It runs a very little bit rough, as in 90% to 95% of smooth normal. The alternator is working correctly but has bad bushing/bearing noises. Under semi-hard braking, the pedal pulses as if it has a warped rotor (not the ABS, different feel), otherwise, they work fine. It rarely loses coolant, oil, brake fluid, ATF or power steering fluid. The AC doesn’t work but it’s still holding pressure. It’s never overheated, or seen temperatures under 20 F or over 105 F. My current plan is to change the air filter, spark plugs and upstream O2 sensor, replace the alternator and belt, and do the front brakes with new rotors. I bought gauges, a vacuum pump and all the stuff needed for the AC. So, finally, here’s my question: My only income is Social Security so I really need this car to last a long time. Are there any jump-up-and-bite-you-in-the-butt characteristics common to this vehicle that I need to circumvent with proactive maintenance? I watch your channel a lot and you often say this or that make or model vehicle is notorious for this or that problem. When I first got out of High School, a friend and I rebuilt about 20 engines (mostly Volkswagen and Chevys) so I’m a little above novice. That was in the late 1960's, I’m far from up to date on newer cars. I learned about individual ignition coils and how fuel injectors worked from you. My experience ended with carburetors, points, rotors and distributor caps. I was a machinist for 18 years after that. Any thoughts would be appreciated. Thanks

[@Stephen-cr3sc]

@tdidan I got an O2 sensor code. So I bought a replacement. I realize the code could indicate a bad catalytic converter, but I won't go there for now.

[@Mrdingdong92]

I know it’s been a while, but I Just did exactly what you did for a 2003 Chevrolet avalanche but the same error code keeps coming back.. any advice ?

[@blair683ify]

Finally a SMA video. I was going through withdraws.

[@garybaker5115]

Great vid, very informative. Easy to follow. Wish you were in my area so you could work on my truck.

[@MISSCHUNDERGUNT]

I get the feeling my mechanic doesn't try this hard :( Great video

[@davidcompton1105]

Love you videos I try to watch everyone you make even if it's on something simple thank you for the content you could be one of the best mechanic I have seen

[@DonaldWood-l8h]

I have a 1995 Chevy 1500 V8 and also my aunt bought gas at a gas station and I bought gas there 30 minutes before that. Her car and my truck messed up running like crap acting like it has no gas. She had to replace a part but mine we replaced the gas put gas treatment in it put plugs and plug whires rebuilt the hole distributor and now it runs great iddeline but it doesn't seem to have enough take off and when it down shifts it loses power and if you are going from 2 to 1st usually it dies. Can you help please it is a auto matic and it is a. 1500

[@NebukedNezzer]

I like this video especially because I own a 1999 silverado 2500 and now I know how to trouble shoot the fuel tank vent system. Just this summer I had my fuel pump replaced with OEM because it started making noise.

[@happycommentator6773]

"Wang Dong" Ahh the good ole Donger !

[@ralfie8801]

Happy Commentator You know that guy has a cousin who is also his parts manufacturing competitor, he's Yang Dong.

[@peterbauer3048]

good work you found the problem and some times you half to go the hole nine yards but in mic …...it pays off

[@samsullivan3992]

Hope you got the job to replace the valve and canister. I do most of my own work as well but when I need to take it to a shop for help finding my problem I let them finish the job. Especially no longer than what it would take you to replace those two parts up on the lift.

[@nickcampbell7198]

I've got an 05 with the same code auto zone printout said evap canister.

[@kellyconstenius676]

Nice, that your able to provide that sort of service for the shade tree guys. If I had a guy I trusted. I would be more than willing to pay for the diagnosis and then I do the R&R. The problem I have, most of the mechanics around here are R&R guys too. Not worth paying a guy to throw parts at it when I could do just that my self. Not kidding either. Around here you hit a snag. You're hosed. They have a few pre practiced lines. " You need a new head gasket." " Your Computer is bad." Are you sure, you did not even hook up a scan tool. " Yea we have seen a hundred of them" I bet you have...

[@oxygen454]

Is it possible to add too much purge to a gas tank with my scan tool? I have a Chevy HHR that has the P0446 and have changed the vent solonoid and purge valve in the front. No obstructions and still get Excess Vacuum. Charcoal canister is clean and not obstructed.

[@TheJmich2001]

Good to see you again. Thanks for getting me hooked on Neutral Drop!

[@rumrunner1756]

Love watching the Bill Nye of mechanics. Thanks for the upload Eric. 👍

[@RedfishCarolina]

That's so rude. Eric is an actual mechanic. Nye is NOT an actual scientist. You want a real scientist, Sir Martyn Poliakoff on the "Periodic Videos" channel would be a better comparison. Not Nye.

[@tomgrabski6585]

Wish your shop was up here outside of Buffalo ny. I have a 07 classic 2500hd 6.0l with p0445 large leak changed purge,vent and new one gas cap any ideas also ran a scan the other day had p0300 random misfire. Just changed plug and wires about 2weeks ago. Any ideas?? Can a large evap leak cause p0300 hopefully you can steer me towards something else to look into love your channel. Thanks man

[@Slamm1983]

I am exact same problem with my '05 Chevy Silverado 5.3l V8 flex fuel ...I have 3 codes..(P0446,P0449 and now P0300)🙄..I put 8 new plugs,wires and coils in..🤷‍♀️ Im replacing vent valve and canister today for 1st 2 codes..and I have to replace 2 O² sensors also but what is causing the misfire code now? Could it be the missing O² sensors?..I also live in NY but I am way up north on Canadian Border and St. Lawrence River...😂🥶 this is my first year as a solo DIY mechanic..as my Dad was who taught me everything but sadly I lost him in June/2022 to a motorcycle accident😔 so any help or advice would be greatly appreciated 😎

[@MosinMan76254]

Sometimes you open up a can of worms. Thanks for another great video Eric!

[@ryans7954]

Glad to see a new video on a Friday