Check Engine Light On problems of the 2010 GMC Yukon

2010 Yukon xl slt 4wd with 5. 3l v8 at 122,000 mi. The vehicle was in motion traveling at approximately 55 mph on highway. Check engine light illuminated, then check stabilitrack, then engine power reduced.

Driving 40mph in traffic and the engine turned off by itself, no power steering or brakes at this point, I was able to stop the vehicle in traffic and put my hazzards on while I tried to figure out what happened. The vehicle was acting as if it was still on and would not restart, I still had power to everything and the dashboard was displaying several error messages. Stabilitrack, traction control and engine reduced power and also the check engine light was on. Vehicle would not restart. After about 5 minutes the vehicle restarted and I was able to drive off, the check engine light stayed on for 2 days. This same exact occurence has occured again this time on 4/27. It also happened while parked on 3/1 with the engine running. I am having the vehicle serviced at a GMC dealership in carrollton texas today.