The check engine light comes on on my 2006 Sierrs 3500HD. I have replaced the plugs and wires. It only has 33,000 miles. Any ideas?

Asked by Mar 06, 2011 at 02:40 PM about the 2006 GMC Sierra 2500HD SL1 2 Dr Regular Cab 4WD LB

Question type: Maintenance & Repair

1 Answer

75

You'll have to get someone to read the OBD code. I suspect it will be an O2 sensor or other emissions hiccup.

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