NHTSA Complaint #11680315 — 2024 CHEVROLET TRAX

I purchased the vehicle Oct. 19, 2023. I use the vehicle likely more than 99% of other owners. I drive for Amazon flex and had 54546 miles when I did my last oil change. I have changed the oil every 5000-7500 miles, including changing air filters regularly and spark plugs at 50,000. I also have always used higher quality oils from Mobil1 and ACDelco in the engine. This past weekend, a check engine light appeared and reduced power was noticed. The following day after restarting the car, the check engine light went away. It came back the following morning on the way to work, and went away after restarting in the afternoon. Code P0325 was the DTC for a knock sensor fault. During this time the MIL was illuminated, a slight metallic rattle sound was present at certain RPMs, but not loud or consistent. The same day after the last oil change and after delivering when going to moderatly accelerate to highway speeds, a sound characterized as a loud pop and bang occurred and smoke started flooding out of the engine. Reduced engine power and check engine lights appeared on the dash and the screens when black. I immediately braked and pulled to the side of the highway, where coolant and oil were flooding the side of the road. The vehicle is currently at the dealership where it was purchased, where I am expecting the “Total Engine Faliure” diagnosis.