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