2009 GMC Sierra Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2009 GMC Sierra Denali
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2009 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 GMC Sierra Denali is known to have issues with the EVAP system, a part of your emission control system.
To correct the issue, the EVAP canister vent valve, solenoid, and wiring must be inspected. The most common fix is replacement of the wiring connector or replacement of the vent valve assembly.
2009 GMC Sierra Denali QuestionsSometimes my radio controls on the steering operate backwards, why is this? (1 answer)
When I adjust radio volume down, it goes up. When I change stations up it changes station down the dail.
This problems occurs about 50% of the time when I'm driving.
I usually just use the manual controls on the radio, they work fine.
When I start it in the morning it holds for awhile then it start with some black smoke from the back and when the check engine light is on the car can't be start from remote control