2020 Chevrolet Silverado engine and engine cooling problems

“The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 55 MPH, the vehicle suddenly began to shake, vibrate, and lose speed. An abnormal knocking sound was heard coming from the engine, and the check engine warning light illuminated. The vehicle was towed to the contact's residence, where the contact, a master mechanic, examined the vehicle. The contact diagnosed that the fuel management system, lifter springs, camshaft lifters, engine push rods, and rocker arms needed to be replaced. The vehicle was not repaired. The local dealer was notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The contact stated that the vehicle experienced the same failure described in the recall. The manufacturer was not notified of the failure. The failure mileage was 11,450.”

“The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle was running rough and the vehicle lost automotive power. The check engine warning light was illuminated. Additionally, the transmission made an abnormal sound while starting the vehicle and while driving, and the torque converter was shuddering. The contact and his father diagnosed the vehicle as having a cylinder misfire and performed a compression test on the engine. The contact replaced the lifter and push rods, deactivated and removed the Dynamic Fuel Management (DFM), modified the engine, replaced transmission fluid, and used Lube Gard Instant Shudder Fixx for the torque converter shudder. The manufacturer was made aware of the failure. The failure mileage was approximately 76,000.”

“The contact owns a 2020 Chevrolet Silverado 1500. The contact stated while driving at 35 MPH, the engine started knocking, and the sound grew louder while making a turn. The Electronic Stability Control and check engine warning lights illuminated. The vehicle was taken to a local dealer, where one diagnostic trouble code was displayed, but the vehicle was not repaired. The vehicle was then taken to a second local dealer, who retrieved a code for fuel injector number eight and diagnosed that the engine needed to be replaced; however, the vehicle was not repaired. The vehicle was taken to a third dealership, Knapp Chevrolet, where it was diagnosed that the engine needed to be replaced. The vehicle remained unrepaired. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 94,000.”

“The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of drive power with high RPM. The check engine, traction control, ABS, and parking brake warning lights were illuminated, and the message "Brake System Failure, 43 MPH Top Speed" was displayed. The contact disconnected the battery and was able to correct the failure. The failure later recurred with no warning light illuminated. The vehicle was turned off and restarted, but the failure persisted. The vehicle was towed to the dealer, but the dealer was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 55,000. The VIN was unavailable.”

“The contact owns a 2020 Chevrolet Silverado. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however the vehicle failed to accelrate as intended. The vehicle was taken to the dealer, howeve the failure was not duplicated. The failure reoccurred. The vehicle was taken back to the dealer where it was diagnosed with a failed wiring harness and a failed coolant oump. The contact was informed that the wirng harness and the coolant pump needed to be replaced. The vehicle was repaired. The contact stated thirteen days later the failure reoccurred. The vehicle was taken back to the dealer where it was diagnosed with a failed transmission and failed coolant pump. The contact was informed that the transmission and the coolant pumo needed to be replaced. The vehicle was repaired. The failure reoccurred three days later. The vehicle was not diagnosed or repaired by an indpendent mechanic or dealer. The failure reoccurred. The failure was persistent. The contact stated tht within a year, the vehicle was taken to the dealer for ellectrical , transmission and engine failures. The contact stated that the wiring harness,…”

“The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 55 MPH, there was an abnormal sound coming from the engine compartment. The vehicle lost automotive power with the check engine warning light illuminated. The contact stated that there was bluish-gray smoke coming from the rear of the vehicle. After releasing the accelerator pedal, the vehicle stalled. The contact restarted the vehicle, but the sound became louder. The vehicle was towed to an independent mechanic, where it was diagnosed, and metal shavings were found in the engine oil. Additionally, there was a misfire in several cylinders, the camshaft not operating properly, and the engine needed to be repaired or replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 131,000.”