2008 GMC Sierra Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2008 GMC Sierra Denali
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2008 GMC Sierra Denali ProblemsReplace 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.
A poor electrical ground under the battery tray may cause the ABS warning light to illuminate. Our technicians tell us that cleaning and properly securing this ground and also the main ABS ground on the frame rail below the drivers door may be necessary.
2008 GMC Sierra Denali QuestionsWhat causes vehicle to would sputter when I press gas peddle while driving (1 answer)
Pressed acceleration peddle and vehicle sputtered as if it wanted to die. I then pulled over and shut vehicle off. Attempted to start and it would not crank unless I pressed the gas peddle.
What could this be
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 few months later and they found a different cylinder (cylinder 4) spark plug with broken seal, got re...
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.