Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Problems for specific GMC Yukon XL Denali years:
Car problem reports
Problem with your car? See what our experts say or submit your own.
Newest reported 2010 GMC Yukon XL Denali problems
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
The rear window defogger may stop working due to a wire terminal broken off of the rear glass. Our technicians tell us that terminal can be reattached using a special glue or silver solder.