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2005 GMC Envoy Denali 4dr 2WD

2005 GMC Envoy
Trim Info:
Rear Wheel Drive, 4 Door
16 mpg city / 20 mpg hwy
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July 5, 2012, 5:02 am

Ken M
 

Question: Running rough and no power.

Oil change was 600 miles ago. Vehicle has 175 K miles.


July 10, 2012, 11:21 pm

Richard W
Expert Mechanic

I would check the tune up. It could just need new plugs. On the bad side you could have a valve issue. A good scan tool will tell you which cylinder is missfireing.


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