2002 GMC Envoy Q&A
2002 GMC Envoy Question: Service Engine Light comes On
Service Engine Soon light came on, took to Autozone and they ran a diagonistics which said number 3 cylinder misfiring. They told me to put some lucas fuel injection cleaner in it run it and if it didn't work change the spark plugs. The car has over 100,000 miles on it. Added the fuel injection cleaner ran for 2.5 hours and 200 miles. Light was gone, however when I was parking the vehicle it came back on. Next day replaced spark plugs, light out. Ran for 20 minutes light on again. Now what do I check? - Visitor
you have coils that fire the plugs that may need to be replaced. take it to shop for a real diag by a pro, not a salesmann that is not a tech. Roy - mastertech6371
I had this problem (Mine said 2) I swapped it with 1 and 1 errored, I replaced the coil pack and it worked fine. - Visitor
Service Engine soon light blinks/comes on intermittently. Steady most of the time but blinks briefly when accelerating. Engine seems to hesitate and idles hard at stops. Started after refueling
Twice, I drove more then 200 miles at one time, my service engine, and the reduce engine power light comes on. I have taken it to the GMC repair shop several times and they can't find a "code". I ...
Help! we are trying to do process of elimantion,changed plugs&wires light went off for 300 miles,light came on again changed fuel cap light went off for 200-300 miles, light back on again changed f...
I took it to 2 GMC dealerships and they stated no codes came on the computer.
My SES light was intermittent for about a week when a technician told me the engine thermostat was going bad. I drove with it for about a month longer when the light came on and stayed on--this wa...