2006 GMC envoy

Asked by Mary May 01, 2018 at 10:01 AM about the 2006 GMC Envoy SLE

Question type: Maintenance & Repair

My check engine light came on flashing
truck running really hard

2 Answers
25,690

Jorge answered 5 years ago

Pull the code(s) and read them to see what could be the problem.

Mark helpful
11,225

FJ4072 answered 5 years ago

Mary, you shouldn't drive it when it's flashing. More than likely one of your 6 (assuming you have the common I6 engine) coils has failed. Bring it to an automotive store and have them read the codes for you. You should see a P0300 or P0301 thru P0306 which should pinpoint which coil it is IF indeed it's not a P0300 which is multiple cylinder misfire.

Mark helpful

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