One problem related to engine shut off without warning has been reported for the 2020 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 GMC Yukon based on all problems reported for the 2020 Yukon.
Vehicle brakes would not operate properly, increased braking effort and message displayed on instrument cluster �service brake system�. This is the 4th time a beake issue has been experienced with a gm suburban/yukon vehicle. First 3 were on our 2017 Chevrolet suburban premier. Also, engine just shutoff in the middle of a turn lane of a busy intersection, no other symptoms so far.