I bought my 2012 LT RS with 129,xxx it now has 167,xxx. I’ve had to replace almost everything in the car. 2 turbos, water pump, thermostat, transmission, valve cover, spark plugs(4ish months ago), a few sensors, and probably other things. It’s always had oil changes at Chevy every 6,000. Anyway, last Thursday I had an oil change and tire rotation everything was fine until I drove to work today(Monday). As I was getting off the highway I noticed a chirping/ whistle noise when accelerating. Had my mom come to my job and drive it to see if she noticed anything and now it’s chirping when idling not when accelerating but that could change as I drive home. It also jerks forward while at a stop light while idling. Any suggestions what it might be? I took out the dip stick to see if that changed it and it still chirps. I really can’t afford to keep fixing this car every 3-4 months.