NHTSA Complaint #11673585 — 2018 CADILLAC ESCALADE

I had purchased the car [XXX] from dealer "Kars R Us" in Dearborn Heights, Mi. On [XXX], I was driving on a highway at 70 mph with my family when I lost control of gas pedal. There was No warning of any kind! I was in the middle lane at the time and noticed the speedometer was decreasing and gas pedal was not working. For the safety of my family, I had to act fast however panicked. I was able to pull myself over to the far lane off the shoulder and within seconds, the car abruptly shut down, entirely. We barely made it to safety! My family was stranded on the highway, unsafe conditions for approx 3 hrs waiting for a tow truck. I had the car towed to the dealership's mechanic shop, with my family riding alongside. The following day I briefed the dealer about the incident and he recommended that I contact my auto insurance and make a claim. His mechanic diagnosed it as an "engine lock", something triggered it to shut down completely to prevent any more damage is what I was told. The engine would need to be replaced as well. I have since made a claim however, 2 months later and 2 appraisals since, claim was declined. The insurance company claimed that there was "internal damage" to the engine and that was not covered under the policy. I'm not sure what to do, obviously I don't have the $$ for a new engine and the dealership has not made any other recommendations since it was sold "As Is". Please advise!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)