Chevy/GMC Truck: P0442 P0455 Small & Large EVAP Leak

29 thoughts on “Chevy/GMC Truck: P0442 P0455 Small & Large EVAP Leak”

1. Power Probe IV : https://amzn.to/3zzZGOU

2. Happy holidays!

3. Just so you are aware. Nobody, and I mean nobody, has ever said you can’t say Christmas. You can unclutch your pearls.

4. Question: I have a 2016 chevy volt and i can smell gas in and around the gas cap area/rear right tire area. The "money light" as you call it is not on, just the gas smell. It is a Chevy but maybe its normal to have a "gas smell" from venting or could it be the gas scrubber/canister/charcoal filter (clearly i don't know what i am talking about), but any high level advice would be great. Thank you

5. Merry Christmas, you FUNNY animal!

6. Just got p0442 small evap leak code on my dads 05 Tahoe z71 I just inherited. Hopefully this will help me fix it myself.

7. yeah all i did on my 07 was disconnect battery and no more evap code for a year

8. The fact that this video has 360k views is a problem

9. There are even more wordy durds when you change them in a gravel driveway

10. I think you'll be fine. Libs don't watch these types of videos.

11. zip ties? i mean sure if it was a race-bike. Am I wrong? Honest question. i figure hose clamp, but…

12. So I got a 2008 Silverado, I changed every sensor even the charcoal canister and I ran a smoke machine and no smoke was coming out but when I check my scanner it still says there’s a large leak, any tips would be greatly appreciated

13. I stilll dont understand why when then vent valve is open( key off) the system wont release pressure from the tank!!! Doesnt make sense to me!!!. I had a tank that wont take gas for yeras..Have to fill right away– before drive far!! otherwise it builds up pressure..

14. Without a scan tool do you turn 8gn on and off for a click

15. @southmainauto
    Hi i have a question
    I have a 2014 chevy silverado 4.3
    N i have the very small leak code
    I was following up with ur video n im a bit stuck checking the fuel tank pressure sensor its stays around .08 to .10inH2O and when i activate the vent it go goes to around .15 tops
    I change the pressure sensor but did nothing the vent valve clicks so idk if thats the issue n already smoke the system and no leaks plz help me !!

16. Can you say Christmas? Who hurt you?

17. Hey, Thanks for the video! Very helpful to understand the EVAP system. Is it normal for the voltage to drop on the FT pressure sensor when pressurizing the system like you showed in this video? All the information I’ve found says the voltage should increase as pressure increases, I’m trying not to replace the fuel tank pressure sensor if it’s not necessary

    Thanks again for the great video!

18. I liked the view a lot and it should me what to do.

19. I love how you asked,”Can you say Christmas?” Then a few seconds later-“Did I grow a V?” Ha ha! Love your channel. My 2009 Silverado LTZ 5.3L is exhibiting a weird albeit subtle behavior and an EVAP code 445 i think. It cycles on and off while in cruise on freeway about 60mph in 6th gear. You can hear it trying to do something,then it stops-then 30-60 seconds later does it again for 10 seconds, over and over. No loss of power. Runs great. I cleared the code,takes about 3 weeks for it to show up on the money light again-but it is in permanent for now.

20. Thank you for another Great video. Cheers

21. GM vehicles are the worst for evap codes in my opinion.

22. P0441 code deals with vacuum leak. Probably torn vacuum line.

23. Just because you have been off for a week gets you no mercy 😬

24. can you bypass the system? delete the system?

25. 05 Chevy, replaced pump 8years ago do to pump rust. last year heli-coil a couple intake mounting striped holes. Yes I was sweating bullets an made sure I didn’t loose my manhood: Couple months ago replaced rusty fuel lines , vent valve-front/ rear , map and tank sensor as preventative maintenance. Ran beautiful for 5hundred miles an radio reception. on til fuel cleaner an super fill made those codes come up , smoked tested at night with glow sticks only to find an intermediate rear sticking valve. Thank you sincerely for videos. Still determined to drive it up therefor an inspection sometime.

26. Will that evaporator system leak will it make the vehicle run worse

27. I have a 2005 GMC Sierra half ton pick up with Evap system problems. I’ve done the purge valve in the tank and the canister valve like you did in your video and I’m still getting an engine light for the same code. What could it possibly be?

28. Does this also make the gas pump at the gas station cut off prematurely???

29. I have both large and small leak codes so I changed gas cap, purge valve, and vent valve but still have same codes. Finally did smoke test but I don’t see smoke coming out. Any suggestions?

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