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Resources for the Repair and Maintenance of your 2008 GMC Sierra Denali

2008 GMC Sierra Denali

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2008 GMC Sierra Denali Problems

Heating & Air Conditioning -- Verified

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

Drive Train -- Verified

Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.

Engine -- Verified

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

Miscellaneous -- Verified

Our technicians recommend flushing the brake fluid every 60,000 miles.  Brake fluid that is dirty may cause problems in the brake system.

Exhaust & Emissions -- Verified

A Loose or worn gas cap may cause Check Engine Light to illuminate.

2008 GMC Sierra Denali Questions and Answers

archlush, 2008 GMC Sierra Denali, Rapid City, SD

Also there cd changer cycles through. Please let me know if there is a quick fix or do I have to take it to a repair shop.

bobbyZ, 2008 GMC Sierra Denali, Chippewa Falls, WI

use the navigation...??? Drives me nuts

Art -Denali, 2008 GMC Sierra Denali, El Paso, TX

Initial symptom was a shaking during stop light idle, took it the dealer and they replace all the spark plugs and found 1 (cylinder 1) with the white ceramic portion broken.
The issue returned a f...

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