Four problems related to equipment have been reported for the 2003 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Yukon based on all problems reported for the 2003 Yukon.
Loss of power without warning , while on highway. From 65mph to 0 without warning. Almost caused a crash pile up. . . . Was almost rear ended. Very dangerous. . . Whole family children and all was in the vehicle.
All meters on the dash board is not working correctly. Meters such as the speedometer, gas meter, rpm meter, etc are not functioning properly. When driving on small roads, highways, and freeways, it does not indicate the speed accurately. The gas meter does not indicate how much gas is in the gas tank when the car is stopped or when its driving. Rpm meter also is not functioning while we're driving.
Losing power throughout my vehicle. Started with the overhead heating/cooling controls. Vehicle will lock itself without any keys when doors are shut. (it has locked me out on numerous occasions) worked its way back towards the rear losing overhead lights. Heater/ac does not work in the rear. Passenger side rear door window or seat belt does not work. Four wheel drive goes crazy. And now the main (front) heating and cooling controls are going ape sh!t crazy.
Vehicle has been serviced several times since first occurrence in September 2014. "reduced engine power" and service engine soon signals appear on vehicle panel causing engine power to be reduced in a matter of seconds. Has happened to me going 10mph, 55mph, and 70mph on highway, causing a near rear collision because I lost power so quickly. I have had it serviced 6 or 7 times since September 2014 and this issue is not getting resolved. Throttle body sensor replaced twice, throttle body harness replaced, all wires, and sensors have been cleaned and thoroughly inspected. Reduced engine power occurs weekly even after being serviced.