I have an 04 GMC Envoy 6 cylinder 4.2. The service engine soon light came on this morning and was running a little rough. We ran around a little bit before stopping at Auto Zone, they hooked up there tester and said you have a misfire in cylinder 4. They said it could be spark plugs or maybe a clogged injector. I bought some spark plugs and went home. I shut the car off and restarted a couple of hours later and the service engine light did not come back on and it seemed to run fine. Any ideas?

I have an 04 GMC Envoy 6 cylinder 4.2. The service engine soon light came on this morning and was running a little rough. We ran around a little bit before stopping at Auto Zone, they hooked up there tester and said you have a misfire in cylinder 4. They said it could be spark plugs or maybe a clogged injector. I bought some spark plugs and went home. I shut the car off and restarted a couple of hours later and the service engine light did not come back on and it seemed to run fine. Any ideas? 5 Answers

i have 2002 gmc envoy , when ever I speed up (around 70) the service engine light comes up and then goes off. But today my car stopped and said stop engine. I waited for 5 mins and then tried restarting. Car was ok and no service engine light came up. after that again i see service engine light (solid one) . HOw can i solve this ? 5 Answers

i have 2002 gmc envoy , when ever I speed up (around 70) the service engine light comes up and then goes off. But today my car stopped and said stop engine. I waited for 5 mins and then tried restar...

i. i replaced the head ligts complete set and the switch at the seem time. on a 2003 gmc envoy . my problem is that i don't have running lits . only hi beam. what can b e the problem. 1 Answer

I. i have a 2003 gmc envoy xl. i replaced both ligts sets and a switch at the same time. the probles is. i don't have running ligts. only hig beams. they use to come on automatically. now i don't ha...

Please help I feel like I'm being lied to and taken advantage of-Bought a used SUV the speedometer doesn't work dealer fixed the mileage went from 160000 to 212000 yet the dealer claims no only160000 1 Answer

I just recently bought a 2003 GMC Envoy 4 wheel drive SUV with 160,545 miles on the dash from a private dealer in Massachusetts. Minutes after owning the SUV I learned that the speedometer and t...

I have a dead GMC Envoy? 2 Answers

Hauled GMC Envoy on trailer. ran the day before. Went to move it off the trailer and the battery was dead. couldn't get it fired up so we put it in neutral while the key was in accessory position an...