Adaptive Cruise Control problems of the 2021 Chevrolet Tahoe

Several issues with certain popups regarding various indicators on dash and engine not getting enough psi.

1st. While driving at highway speeds my vehicle disengaged from adaptive cruise control when no cars were in view of sensors. However, cars were behind me, making it a little scary. Happened once but I haven't had my vehicle to know if it would happen again. 2nd. Car has a vibration at speeds of 30 to 40 mph. Vehicle has literally been at dealership since February 10th, 2025 with no eta for valve body in sight.

It’s happened about 10 times since I’ve owned the car but the dealer can’t recreate it so we are out of luck. The vehicle accelerates on its own. Scenario 1…with constant light steady acceleration, it will lurch forward like I’ve stomped on the accelerator a bit, for about a second then go back to my normal input. Scenario 2, same lurch but this time while coming to a stop at a stop sign with my foot on the brake pedal only. Scenario 3…I’ve been using the adaptive cruise control and had it disengaged by braking, coming to a stop, then parking and turning the vehicle off. Then after getting back in and starting up and slowly pulling forward, the cruise control suddenly and abruptly renegages and attempts to accelerate to the last demanded setpoint. Image this scenario pulling out of a spot at a crowded gas station with pedestrians. I almost ran someone the hell over just now at the gas station and I’ve had enough. The dealer won’t do anything and when I called chevy engineering they put zero effort into it, it was a 20 second phone call stating if it can’t be reproduced at the dealer there’s nothing they can do. This is absolutely completely 100% dangerous and unacceptable.