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 of 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 of 1 people found this helpful.
75,395

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

4,275

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 14,918 nationwide Canyon listings starting at $1,500.

ZIP:

GMC Canyon Experts

  • #1
    markee1964
    Reputation
    310
  • #2
    Poppy4400
    Reputation
    120
  • #3
    2004CanyonNC
    Reputation
    100
View All

Related Models For Sale

Used Chevrolet Colorado
324 Great Deals out of 42,760 listings starting at $1,299
Used GMC Sierra 1500
1,161 Great Deals out of 62,192 listings starting at $1,295
Used Toyota Tacoma
555 Great Deals out of 41,981 listings starting at $2,500
Used Chevrolet Silverado 1500
2,774 Great Deals out of 158,072 listings starting at $1,000
Used Ford F-150
3,116 Great Deals out of 231,596 listings starting at $1,300
Used Nissan Frontier
474 Great Deals out of 25,389 listings starting at $1,400
Used Toyota Tundra
660 Great Deals out of 36,619 listings starting at $1,500
Used Ford Ranger
123 Great Deals out of 5,041 listings starting at $1,299
Used Ram 1500
1,330 Great Deals out of 119,400 listings starting at $4,250
Used Honda Ridgeline
86 Great Deals out of 6,267 listings starting at $4,432
Used GMC Terrain
593 Great Deals out of 36,099 listings starting at $4,799
Used Nissan Titan
328 Great Deals out of 22,025 listings starting at $1,995
Used GMC Acadia
865 Great Deals out of 44,532 listings starting at $3,500

Used Cars For Sale

2012 GMC Canyon SLE1 Crew Cab For Sale
6 Great Deals out of 33 listings starting at $11,988

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.