Diesel Engine problems of the 2016 GMC Canyon

My wife and I were traveling at approximately 55 miles an hour when all dash lights nav system gauges etc. Turned off. It was as if I turn the ignition off. Then it turned itself back on and seem to function normally. The vehicle had a similar problem previous to this and there was a recall performed on it recently. Also this vehicle is supposed to get close to 30 mpg and now the best I can get is 21 mpg. It has had a rough idle and shut down on me several timesduring the last few years. I feel like this vehicle is unsafe and GMC should be held accountable. I bought this vehicle because I wanted good fuel economy from a diesel and that is not the case. This vehicle has had a number of major issues and numerous recalls but none have addressed the vehicle shutdown. I have read multiple accounts of owners nearly getting killed when their vehicle randomly shuts off while driving. The vehicle seems unsafe and I feel they misrepresented the fuel economy of the diesel engine.

I purchased a gm 2016 Canyon in October, 2016 and had driven it nearly six months when the event decribed here occurred. Up until April 16, 2017, I had had no problems with the truck. However, on easter Sunday afternoon, while attempting to slow my Canyon down and preparing to stop at a stop light, the engine seemed to go forward of it's own volition and the truck did not respond to my efforts to bring it to a complete stop. Consequently, my vehicle struck the vehicle immediately in front of it. A subsequent internet search revealed that a technical safety bulletin issued by gm in September of 2016 described this event as having occurred to 2016 Canyon diesel engines. My vehicle has a gasoline engine; nonetheless the condition was described in the bulletin (TSB 16-na-276) "some customers may comment on a shudder at low speeds, an idle surge when stopped or approaching a stop. " this idle surge describes exactly what happened to my vehicle as I was attempting to slow down and stop at a red light. Although there was no damage done to my vehicle, the officer who investigated the accident would not let us drive our vehicle until it had been examined and evaluated by our local gm service department. The service personnel adamantly maintained then (and now) that the accident did not happen as I described it. I had to contact GMC customer care center to have 15 minutes worth of diagnostics done per computer, esp the engine control module. The TSB states: "if you encounter a vehicle with the above concern, reprogram the engine control module with the latest calibrations. " luckily, the gentleman at the customer care service was able to intervene and have the engine control module evaluated and documentation that there were no problems with it or any other "control modules" provided to us by our local gm service department.