2010 GMC Sierra Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2010 GMC Sierra Denali
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2010 GMC Sierra Denali ProblemsCheck Engine Light Due to Gas Cap Issue
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
2010 GMC Sierra Denali Questionswhy when temp is below 80 will turn over start then die for about 15-20 minutes (1 answer)
only happens on cool mornings after its warmed up runs great says "engine power is reduced" and "service theft deterrent system"