Two problems related to car stall have 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.
Airbag service light is on, oil pressure fluctuation occurs and the vehicle pulls to the left when applying brakes after new brake pads and rotors were installed.
Driving at roughly 50 mph. Went to pass car on two lane highway. Accelerator stuck to floor (not stuck on floor mat or other object). Vehicle accelerated to 95 mph, slowed to 70 with brake depressed fully. Slowed to 50 with brake and emergency brake depressed. Accelerated when downshifted into manual. Finally put in neutral and was able to stop. Had complained of rough idle, stalling and reduced power for 3 years (since we had car for only a few months). See some discussion that a dirty throttle body could lead to all of these problems. 3 years with 3 different gm service shops and no solution. Fortunately the road was not crowded and was straight. Obviously, this could have been a fatal problem for us. It was my wife, myself, and our three children under 4 years of age in the vehicle.