Engine light flashing

Asked by 83jbg Aug 02, 2020 at 09:06 AM about the 2007 Chevrolet Trailblazer LT 4WD

Question type: Maintenance & Repair

Engine light comes on and now it's flashing on and off,
when I hit the gas it hesitates like doesn't want to pick up
speed.

1 Answer
40,180

TDolby answered 3 years ago

A flashing check engine light and hesitations indicates misfires. Scan for the OBDii Trouble codes to determine what cylinder or cylinders are misfiring. At a minimum, I would replace all the spark plugs if they are original, and any coil or coils that show up during the scan of the vehicle. An auto part store can scan it for you for free or borrow one. Post the 4 digit codes back here if you want further help.

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