One problem related to o2 sensor has been reported for the 2015 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 GMC Yukon based on all problems reported for the 2015 Yukon.
Just got this vehicle 2 months ago. Brake lights seem to work when the want to. Have read others reviews and seems everyone with this vehicle is having the same issue! the cruise control works when it wants too,. Check engine light is off and on had it checked once while on and was told it's an O2 sensor. When the check engine light is on remote start won't work. Seems the brake light issue is purposeful since so many people have the same issue and it costs so dang much to fix it! for such a nice vehicle and expensive payment you would think there would be no issues.