I was traveling on the highway when my 2023 Yukon Denali engine shut off and switched to the neutral gear with any warnings. The dashboard display read ‘press start again’ as I coasted to the shoulder of the highway. I was able to put the vehicle in ‘park’ and re-start the engine after a couple of tries. I got a couple miles down the road, got off on an exit ramp then it shut off again and I again coasted to the shoulder of the highway. Again the display read ‘press start again’, but this time the vehicle would NOT restart at all. I had full electrical power in the vehicle during both engine failures. I had the vehicle towed to my local GMC dealership. The dealership told me that I needed a new engine after assessing the vehicle.