Check Engine Light
10

Asked by Ampball Jun 30, 2013 at 03:58 AM about the 2007 GMC Yukon Denali AWD

Question type: Maintenance & Repair

05 gmc denali chk engine light
flashing, engine loosing power,
vibrates ... all of a sudden, no
previous issues, maintenance on
track. Any guesses

4 Answers
9,655

Lars answered 11 years ago

Could be anything, you need to hook it up to a code checker to find out why the CEL came on. Vibration is always a bad thing for an engine, but with the info here it could be anything from ignition or fuelling issues to serious mechanical problems.

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10

Ampball answered 11 years ago

Thanks Lars, had it towed so waiting for mechanic to open for business....hoping for the best

1 people found this helpful.
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69,795

John answered 11 years ago

Check engine lights flash because there is a misfire. A misfire will quickly destroy your catalytic converter costing a lot of money to replace.

1 people found this helpful.
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Guru9ZD8HB answered 3 years ago

engine light starts flashing after 30 mph. before that the engine light is solid on. not really any notes of missing or lose of power.

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