One problem related to ignition has been reported for the 2009 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 GMC Yukon based on all problems reported for the 2009 Yukon.
When the vehicle is placed in park, key turned to off position and the keys are removed from the ignition, the engine remains running and engaged until the driver or passenger door is opened. When the door is opened, then the engine cuts off.