2021 Chevrolet Tahoe problems

“Driving on the highway when all lights lit up on the dashboard. Car slowed down immediately following alert notifications. Towed to dealer. Was told I needed Camshaft and both banks of lifters all head bolts and head gaskets (W) [Other]: Camshaft actuator and bolt and chain tensioner”

“Fuel pump control module failed at under 60k miles. No parts in stock and was told by dealer, no parts anytime soon. This is unacceptable, especially since this is a known problem. A rental car should be provided as expected wait time is now going on two weeks.”

“Vehicle is a 2021 Chevrolet Tahoe Premier with under 50,000 miles. The vehicle experienced a sudden and complete loss of reverse gear, accompanied by violent lurching, sputtering, and dangerous hesitation/stuttering while accelerating between gears at speed. A certified dealership inspection physically diagnosed the vehicle with multiple stuck valves inside the transmission control valve body, requiring a complete valve body replacement. This exact mechanical failure completely mirrors the known safety defects outlined in GM Special Coverage Program N242454441, which details transmission pressure losses causing gear engagement conflicts and potential rear-wheel lock-up hazards. The replacement transmission component installed by the certified dealer failed catastrophically within four miles of pickup, again causing severe transmission sputtering and shifting failures that render the vehicle entirely unroadworthy and a safety hazard on public roads. The dealership has been forced to order an entirely new replacement valve body assembly under warranty due to a consecutive failure. General Motors Corporate Customer Assistance acknowledged that the vehicle is…”

“While traveling at highway speeds, the vehicle experienced an instantaneous, simultaneous, and total failure of both the electronic eBoost braking system and the electronic power steering assist. The dashboard flashed multiple critical system malfunction notifications with zero prior warning. When attempting to slow down, the brake pedal sank completely to the floor with zero mechanical resistance and provided absolutely no braking response. Primary control of the heavy SUV was lost, forcing a dangerous maneuver across three highway lanes to avoid a high-speed collision. The vehicle is currently at a dealership due to a Fuel Pump Power Control Module Recall. Because this module interfaces with the high-speed electronic data network (CAN bus), its failure mode appears linked directly to the catastrophic communication drop that disabled the eBoost brakes and steering. This failure aligns with the mechanical faults documented under federal safety recalls 21V-455 and 21V-579, as well as the active NHTSA Engineering Analysis EA26006 investigating GM eBoost system failures. The defect completely stripped the vehicle of its primary safety functions without warning.”

“I received an automated message from the vehicle stating to service the safety restraint system. I took the car to the local dealer and they ran a diagnostic review. There is a TSB for the vehicle and they say that the problem is coming from the overhead console part number 86575239. This part is not available anywhere. I contacted General Motors and requested assistance. All they have done is escalate it to the parts delay team. When I called today, all they say is they do not have any information available. They can’t even say when the part will be in stock. The dealership was unable to say that the airbag system would work as required or not. The car is unusable due to the passenger air bag system fault.”

“The contact owns a 2021 Chevrolet Tahoe. While the contact’s wife was driving 55 MPH, the vehicle unexpectedly started losing automotive power before the vehicle stalled. The driver was able to safely guide the vehicle to the shoulder of the highway. The vehicle was towed to an independent mechanic, where it was diagnosed with a fuel pump power control module failure and the vehicle was repaired. The contact associated the failure with NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline); however, the VIN was not included in the recall. The dealer was contacted and stated that there was no recall associated with the VIN. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 96,202.”