2020 CHEVROLET SILVERADO 1500 Complaints

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 71 MPH with cruise control engaged, the vehicle experienced braking and power steering failure. The Traction Control, Brake, Parking, Antilock Braking System, Electronic Fuel Control, and Check Engine warning lights were illuminated. Additionally, the Brake Assist failure, Steering failure, and Trailer Brake failure messages were displayed. The contact shifted into neutral and coasted over to the side of the road. After turning off the vehicle for approximately an hour, the contact was able to restart the vehicle and drove 40 MPH back to the residence. The contact stated that after the failure, the vehicle had to be shifted into neutral, and then the parking brake was activated to come to a stop. The contact stated that a diagnostic test confirmed the steering and brake failures. The contact used a diagnostic tool to retrieve DTC: C0580. An appointment was scheduled with the dealer, but the vehicle was not yet diagnosed. The contact discovered information related to NHTSA Campaign Number: 20V116000 (Service Brakes, Hydraulic), but the VIN was not included in the recall. The manufacturer had not been notified of the failure. The failure mileage was approximately 104,000.

Without warning (no warning lights or previous mechanical indications) the power steering failed making it extremely difficult to turn the steering wheel. Fortunately this happened while I was parking and not on the highway. The truck had approximately 48,000 miles on it at the time. (8/30/25) Repairs required replacing the rack and pinion steering and a heavily corroded "grounding strap". Repair cost was appx $3500

Summary: While driving, the transmission intermittently fails to shift and the truck has locked up and screeched to a complete halt approximately four times, creating a sudden stop/near rear-end-collision risk. Details & timeline: First symptoms were around 55,010 miles. On 10/13/2024 the Chevrolet dealer performed “SERVICE TRANSMISSION GM” (fluid & filter), but the condition continued. In April 2025, a shop documented DTC P0700 & P2727 (pressure-control solenoid), burnt transmission fluid, and clutch material in the pan, and recommended replacing the transmission, transmission cooler, and cooler lines. Earlier, the transmission control module was reprogrammed, and oil cooler lines were replaced, but the truck still intermittently fails to shift while driving. The check engine light has illuminated during some events. Engine safety concern: During the same period the engine oil was found very low/“no oil on dipstick” with no external leaks; an oil-consumption test was recommended, raising concern about internal engine damage and possible contamination from the transmission failure. Safety impact: The lock-up / abrupt stop events occurred while the vehicle was in motion at approximately [~speed and road type, e.g., 35–55 mph on city/secondary roads], forcing hard braking by vehicles behind me. This presents a risk of sudden loss of propulsion and crash. Frequency: About four lock-up events so far; shifting failures are intermittent and ongoing. Current status: Vehicle at ~73,000 miles. A Chevrolet dealer is being asked to perform a factory diagnosis and to submit a manufacturer goodwill/warranty review.

Just recently my power steering started cutting in and out in parking lots. I have seen that there is a ongoing investigation into steering problems with these trucks. I have not took it to a shop, because it just started and has only done it in parking situations. There are no lights or warning codes on the dash. It was about two weeks ago that it started. The vehicle is available for inspection upon request. I just would not like to experience it failing on the road.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated while driving at various speeds, the vehicle was shaking and vibrating abnormally. There was no warning light illuminated. The contact stated the failure was a recurring failure. The vehicle was taken to a local dealer and the contact was informed that the oil level was low, and oil was added. The dealer had not diagnosed the vehicle. The contact stated that the failure reoccurred. The contact had been checking the oil level and was constantly adding oil. The contact stated that the same dealer had changed the spark plugs and fuel injectors in January 2025. Recently the contact was unable to start the vehicle, and the vehicle was towed to the same dealer. The vehicle was not diagnosed; however, the dealer advised that the failure might have occurred due to a failure with the transmission. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 136,888.

Dear NHTSA Office of Defects Investigation: I am filing this formal complaint regarding General Motors' failure to provide a timely remedy for safety recall XXX and GM's inadequate response to a catastrophic transmission defect that has affected my vehicle twice, resulting in complete transmission lockup while driving at highway speeds. *SAFETY INCIDENT HISTORY My 2020 Chevrolet Silverado 1500 has experienced the transmission control valve defect described in recall XXX on two separate occasions, both while driving at approximately 65 mph on the highway. Each incident resulted in complete rear wheel lockup, creating an immediate life-threatening situation. Following the second failure, I had the vehicle towed to Huffines Chevrolet Plano [XXX] ) on August 18, 2025. UNREASONABLE DELAY IN RECALL REMEDY As of today, October 6, 2025, my vehicle has remained at the dealership for 49 days with absolutely zero action taken toward repair. The vehicle has not been evaluated, diagnosed, or repaired. The dealer states they have only one transmission technician to handle the massive volume of recalled Silverado trucks affected by this defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

10 speed 10l80E transmission Whining noise from trans fluid pump gears and bearing known problem in the silverados pleease see link below [XXX] this involves taking the gearbox out and replacing the gears very expensive. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Several times my transmission has began to shift hard miss gears while hitting the brakes. Lose of power/hard shifts/ not shifting when it’s supposed to/jerking and or harsh shifting slipping delay in shifting slams into gear check engine light comes on after check engine light is on it continues until codes r deleted and or battery power is disconnected. This is a problem with codes like 0700/0716/0796 for the tranny control system sticking malfunctioning happens several times in the last year about every 3-4 months

VIN: [XXX] Component: Powertrain / Transmission / Recall Remedy Description of the Problem: Recall remedy applied in June 2025 failed. Transmission subsequently failed. On August 25, 2025, a Mangino Chevrolet technician confirmed in writing that the failure was “related to the recall that was previously performed.” My truck was previously in GM’s care at Van Bortel Chevy (Nov–Dec 2024), after the recall officially opened on 10/24/2024, but the remedy was not applied at that time. I was forced to continue driving thousands of miles with the defect still present. Despite the written admission that the failure is recall-related, GM Customer Care has only offered a 50/50 split on the transmission replacement (my portion ˜ $3,950.34 + tax) and is now attempting to reframe the issue as a maintenance problem. Transmission fluid service intervals are not the cause here — the federally mandated recall remedy failed to prevent the very failure it was supposed to address. This situation has left me without a safe, reliable vehicle. GM has acknowledged the recall remedy failed but is refusing to take full responsibility. I am requesting that NHTSA investigate GM’s handling of this recall remedy failure. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Truck experienced reduce power mode. Took to have codes ran and it showed 24 separate codes when engine light comes on. While riding down the road, truck will go into reduce power mode, shift automatically into 4x4, and several other notifications will appear. Taking to dealership and was told the electrical wiring harness was shorting out causing this issue. Cost around $700 for repair, happened one month later, took it back and no charge for the 2nd time. It is currently in reduced power now. Dealership stated to replace the wiring harness would cost over $3,000. Dealership stated this was a manufactures defect, but no recall was issued so all cost is on the owner.