Two problems related to warning light on have been reported for the 2004 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Yukon based on all problems reported for the 2004 Yukon.
Airbag system failure noted by warning light. Inspected by GMC dealer who could not determine the cause. Recommended complete control system replacement >$1000. 00.
First the airbag warning light came on. This has been an ongoing issue since 2008. My speedometer registered the wrong speed. My settings for the seat and mirrors quit working over time. Hot air would come out of my vents when the air conditioner was on randomly. Radio, navigation, heat, air conditioner and mirrors would turn on/off randomly without touching controls. The last 3 years went through 3 batteries in 3 years. Tests showed at least 5 things are actively draining battery in the fuse box. Issues happened mostly when car was on but mirrors would randomly move when car was not on, very creepy.