NHTSA Complaint #11421586 — 2015 CADILLAC ESCALADE

I bought the vehicle on May 27, 2021. I filled the tank with 87 octane on 3 separate occasions between May 27 and June 4, 2021.The engine (6.2L V8 L86 EcoTec) shut off during a trip on May 31, 2021. I was pulling into a restaurant and there were no indicators of any issues. While pulling up into the drive thru, the engine lost power. No Check Engine Light appeared at all. On a second trip (June 6, 2021), the engine again lost power while coming off of a highway exit. This time, I experienced loss of acceleration and then the vehicle shut off as I pulled into a parking lot. Both times I had to put the vehicle into park, shut off and then start back up. Again, no Check Engine Light. I drove the car to an auto parts store to buy a fuel additive. It was driving roughly at this point, but as I pulled into the parking lot, again a loss of power from the engine. It never started back up. Each time the vehicle shut off, I was driving it, not parked or stopped. There were also no indicators of any malfunction.