37 problems related to electrical system have been reported for the 2021 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 GMC Yukon based on all problems reported for the 2021 Yukon.
Driving approx. 62 mph on a highway, went to slow down and unable to brake, upon pushing down on the break there was resistance, after pumping the breaks multiple times I was eventually able to slow down with a lot of force. Messages on dashboard read "brake system failure" "62 max speed esc, service esc, service trailer break system, and forward collision system unavailable. " abs, esc and check engine light all illuminated on dash screen.
We were coming back from a trip with my children and this vehicle was barely 2 weeks old with 0 miles and we were on a highway when all the emergency lights on the dash went off. It was flagging the electrical system, the engine, the brakes. Honestly all the lights possible went off. The vehicle was lagging and it felt force when we pushed on the gas. Our hands were gripping the steering wheel to keep it in lane till we could get off.