Engine Stall problems of the 2016 GMC Yukon

I have a 2017 Yukon xl denali. It has 6k miles. I purchased it new June of 2017. I was driving through a parking lot,went over a speed bump at about 3 mph and then I notice the ac turned off. Then I realized the rpm was at 0 and when I pushed the gas pedal there was no response. The engine had stalled out while driving. I took the car in for service and they were unable to replicate the issue. There were no codes stored on a car I'm told has about a bazillion computers (imagine that) and that there were no other customer complaints or "service bulletins" stating it was a known issue. Apparently if your GMC service dept can't replicate the issue. . . The car is obviously fine. I told them I'm not taking the car back. They would not allow me to continue using a loaner nor did they have a similar car even available if they would. They told me to contact gm customer service and create a case to which I did. At this time I'm still waiting to hear what gm is going to do but I've had to personally pay for a car rental because I'm not willing to drive a car that has experienced and issue as drastic as this which could kill someone. Hopefully gm recognizes this and either works to figure out the problem or take the car back to run extensive tests. I guess a problem like this isn't an issue until someone dies. . . Which has already happened in other gm vehicles with similar stalling issues. If you experience an issue like this, please contact gm customer service and do as I did and refuse to take the car back. I've only read of a couple other instances of this on the new Yukon platform/bodystyle (2015 and newer). I can guarantee that gm will be sued if I take this car back and end up in an accident because of it. I'm sure they'll deny it because there once again. . . Won't be any codes to tell them the care died, so it'd probably me my fault anyways.