Yukon momentarily turns off during hard acceleration

[DennisT]

While driving my 2016 6.2L Yukon Denali on the interstate yesterday I needed to accelerate quickly from about 60 to 80 mph. I mashed the throttle and the transmission kicked down and I started accelerating. About 1/2 way through move the engine, dash and all instrument lights momentarily turned off and restarted. That was quite a surprise. The truck continued on with no further issues. The truck has 96,000 miles on it and has never done that before. Should I have the codes scanned? Does anyone have an idea what could have happened?

 

[swathdiver]

While driving my 2016 6.2L Yukon Denali on the interstate yesterday I needed to accelerate quickly from about 60 to 80 mph. I mashed the throttle and the transmission kicked down and I started accelerating. About 1/2 way through move the engine, dash and all instrument lights momentarily turned off and restarted. That was quite a surprise. The truck continued on with no further issues. The truck has 96,000 miles on it and has never done that before. Should I have the codes scanned? Does anyone have an idea what could have happened?

How old is the battery?

 

[OR VietVet]

Check battery, like @swathdiver said, cables for tightness and cleanliness and check all grounds. The engine movement from hard accel can maybe cause a connection some where to be moved. How are the motor mounts?

 

[DennisT]

How old is the battery?

It’s probably a couple of years old.

 

[swathdiver]

It’s probably a couple of years old.

Well, if the battery is weak, it may not have had the reserve capacity to deliver full power to the truck and that's why she cut out.