If the emissions warning light comes on & then goes out after 2 tankfuls of gas, do I still need to have it checked out

Asked by Aug 23, 2013 at 03:55 PM about the 2012 GMC Canyon SLE1 Crew Cab

Question type: Maintenance & Repair

Just after filling up at a name brand gas station on a recent trip to AR, the emissions warning light came on.  We checked the gas cap; fine.  The light remained on throughout that tankful & the next, so I had our local GMC dealer check the truck out once we got home.   I was told they needed to replace some type of wiring harness; it had to be ordered.  The day before I was to take the truck back in for the repair, the emissions light went shortly a new tankful of gas.  The truck ran fine, no hesitation, rough idle, nothing but smooth performance throughout this whole deal.  Do we still need to proceed with the repair?

4 Answers

You've got to learn to STOP at the FIRST click...I kid you not, this is a hard habit to break, but once there is a long pause from filling and comes to a stop....DO NOT try to add more gas...it will flood the charcoal canister and temporarily disable the emissions control system~~

1 people found this helpful.

in short....DO NOT fill your tank...have someone who knows how to stop at the first click, thus saving your canister~

1 people found this helpful.
78,075

What trouble codes did the GMC dealer find? There is a sensor that monitors the pressure inside the gas tank. Replace your gas cap. It may be leaking and you'd never know it. But the computer will pick it up because of that pressure sensor. You should get a trouble code for the EVAP system (gross leak detected) if it's the gas cap. HTH. -Jim

4,345

packnpaddle, If you would like for us to speak with your GMC dealership in regards to your concerns please let us know. Email us your name, VIN, address, phone number, mileage, and name of your GMC dealership to socialmedia@gm.com. Erica Tiffany GM Customer Care

Your Answer

Canyon

Looking for a Used Canyon in your area?

CarGurus has 15,009 nationwide Canyon listings starting at $1,100.

ZIP:

GMC Canyon Experts

  • #1
    markee1964
    Reputation
    330
  • #2
    Poppy4400
    Reputation
    120
  • #3
    2004CanyonNC
    Reputation
    110
View All

Related Models For Sale

Used Chevrolet Colorado
295 Great Deals out of 41,682 listings starting at $1,900
Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995
Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,285 listings starting at $1,495
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used Nissan Frontier
267 Great Deals out of 24,625 listings starting at $1,550
Used Ram 1500
901 Great Deals out of 119,059 listings starting at $5,995
Used Ford Ranger
116 Great Deals out of 4,570 listings starting at $1,895
Used Toyota Tundra
478 Great Deals out of 38,526 listings starting at $1,999
Used Honda Ridgeline
57 Great Deals out of 7,308 listings starting at $3,027
Used GMC Terrain
449 Great Deals out of 28,778 listings starting at $4,990
Used GMC Sierra 2500HD
142 Great Deals out of 15,260 listings starting at $3,500
Used Nissan Titan
254 Great Deals out of 22,941 listings starting at $1,995

Used Cars For Sale

2012 GMC Canyon SLE1 Crew Cab For Sale
28 listings starting at $9,998

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.