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 Problems

Check Engine Light Due to Gas Cap Issue

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Replace spark plugs every 100,000 miles

The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.

Contamination of extended life coolant
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

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2010 GMC Sierra Denali Questions

why 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"

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2010 GMC Sierra Denali Reviews

6.2 liter sounds like a deisel-very noisy. 6 speed trans vibrates in 6th gear. Dealer said they all do that! Still trying to get fixed under warranty. DON'T buy a 2010 Sierra Denali!

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