2021 Chevrolet Camaro Engine problems

Dealership replaced all 16 lifters and replaced camshaft. Dealerships repair took 28 days. Repair cost $4k out of my pocket and Chevrolet Corporate covered $4700 due to the know lifter issue with their engines. Within 24 hours & less than 100 miles, vehicle started making new abnormal noise, and the engine shut off and would not start back up. There were no warning lamps, messages or symptoms prior to the dealership's extensive engine repair. Had it towed back to the dealership. Dealership informed that it was...

The coolant thermostat is not working correctly and could possibly cause you to damage your car due to it not being the right operating temperature or over the normal operating temperature because it goes down into the 130 while I drive and goes up when I start slowing down.

there is a burning oil smell, that is so pungent it causes nausea and burning of the eyes when driving the vehicle. have taken it to 2 separate dealerships, the first told me they could not find an oil leak and i would have to deal with it. the second dealership stated that it is a valve on the back of the motor and that there is nothing they can do about it. i was told not to roll down the windows and to leave recirculate on. called and spoke to gm directly and they state take it to a third dealer and they denied my request to send a master tech to check the vehicle. i am left with driving a car that leave me nauseated and is a possible hazard to drive.