2020 Chevrolet Malibu brakes problems

Filed Oct 30, 2026 · Brakes · 74,356 miles · OK

The contact owns a 2020 Chevrolet Malibu. The contact stated that while the vehicle was parked, the vehicle failed to start, with several unknown warning lights illuminated immediately before the failure. The contact stated that the brake pedal was extremely firm while attempting to shift into neutral(N). The contact stated that while driving 25 MPH, the brake pedal was depressed and the message "Brake System Failure" was displayed. The contact stated that the brake pedal was stiff and difficult to depress. Within 3 to 4 seconds, the brake pedal pushed back against the foot. The vehicle was taken to the dealer, where it was diagnosed that the ESC had failed and needed to be replaced. The vehicle was not repaired. Additionally, the Auto START/STOP function was inoperable. The failure mileage was approximately 74,356.

Filed Oct 29, 2026 · Brakes, Engine · MO

I got the engine light ON on dashboard! I need someone to check out for me, please. Thank you

Filed Sep 8, 2026 · Brakes · 120,000 miles · MD

The contact owns a 2020 Chevrolet Malibu. The contact stated that while attempting to depress the brake pedal, the brakes failed to respond and seized, causing the contact to engage the parking brake. The contact was able to pull over while awaiting tow truck assistance. The vehicle was towed to a dealer to be diagnosed. The contact stated that a Lexus engineer retrieved the EDR; however, there was no failure found with the braking system. The failure mileage was 120,000.

Filed Aug 23, 2026 · Brakes · PA

I have a failed vacuum pump which caused my braking ability to be 100% reliant on my own strength to be able to “safely” stop the car. This is an ongoing and common problem with GM yet they have not recalled or given any solution. This is unsafe and should be illegal. I have now an underwater car loan and still a non-drivable car because not only do i have to repair the vacuum pump but also the camshaft exhaust as well as timing chain. All of these repairs are things GM willingly hides from customers if they already knew this was an issue.

Filed Aug 5, 2026 · Brakes, Electrical · NC

My 2020 Chevrolet Malibu experienced a sudden and severe electrical failure after driving through normal roadway water. Immediately afterward, the vehicle displayed multiple safety‑critical warnings including loss of power steering assist, Electronic Stability Control (ESC) faults, brake control faults, and reduced propulsion. A GM dealership inspected the vehicle, scanned the modules, and found more than a dozen network and chassis‑related diagnostic trouble codes, including: B3979, U0164, B1325, B3122, U0121, C0196, C0460, B1011, B097B, B3205, C056E, C056D, U0420, U1510, C0545, U0422. These codes indicate failures in the steering system, brake control module, stability control system, body control module, and multiple CAN‑bus communication networks. The dealership confirmed: – No physical damage – No evidence of collision or impact – No evidence of flood damage – The suspected failed component is the electric power steering rack (GM part 85621696) – The part is not available, meaning the vehicle cannot be repaired – I would be responsible for diagnostic and repair costs This is a major safety concern. The vehicle can lose steering assist, stability control, and braking support without warning. The inability to obtain the required steering component makes the vehicle unrepairable and unsafe to operate. I am reporting this because this appears to be a systemic electrical/network failure affecting critical safety systems. I believe this defect poses a significant risk to drivers, passengers, and other motorists. The attached photo is a is a picture of the printout the Chevrolet dealership Service Manager provided to me.

Filed Jul 6, 2026 · Brakes, Driver assistance · WA

While driving, the brakes became hard and the vehicle was difficult to stop. The brake pedal required excessive force, brake assist was reduced, and the stopping distance increased, creating a serious safety hazard. The check engine light had been illuminated for approximately two years before the brake failure occurred. In January 2024, I reported brake-related concerns to a Chevrolet dealership while the vehicle was under warranty, but the root cause was not diagnosed. In November 2025, after the brake pedal became hard, an independent repair facility inspected the vehicle and determined the brake problem was caused by a failing engine vacuum pump. They advised that the vehicle be repaired by a Chevrolet dealership. By January 2026, the brake condition had worsened to the point that the vehicle was no longer safe to drive and had to be towed. A Chevrolet dealership later confirmed that the engine vacuum pump had seized and damaged the camshaft, requiring replacement of both components. The vehicle remains inoperable. The failed vacuum pump caused loss of brake assist, resulting in a hard brake pedal, reduced braking ability, and an increased risk of a crash. I believe this represents a serious safety defect because failure of the vacuum pump significantly impairs the driver’s ability to stop the vehicle safely. I understand GM has issued service information regarding vacuum pump failures on this engine, and I am submitting this complaint because I believe other drivers may experience the same dangerous brake failure.

Filed May 7, 2026 · Acceleration, Brakes · NC

May 7, 2026 the federal safety agency 1200 New Jersey Avenue SE Washington, DC 20590 RE: Safety Defect Complaint – Brake System / Vehicle Control Concerns 2020 Chevrolet Malibu I am submitting a safety complaint regarding persistent braking and vehicle control issues involving my 2020 Chevrolet Malibu. Prior to December 31, 2025, the vehicle exhibited jerking during braking, all dashboard gauges go to the left, warning lights, reduced power (20-25mph), and inconsistent braking behavior. This situation happens without warning, at any given time, even in the flow of traffic. An independent inspection indicated the brake system was in proper condition, suggesting a more complex underlying safety issue. The vehicle was taken to Reed-Lallier Chevrolet for diagnosis and remained there for approximately five months. During that time, I was not provided documentation confirming completion of a brake system diagnostic or a clear resolution path. Due to the extended delay without diagnosis, I no longer feel safe operating the vehicle. I am also concerned that prolonged inactivity without proper repair may have worsened the condition and increased risk of failure. Given the nature of the symptoms involving braking and vehicle control, I request review for potential safety-related investigation. Vehicle Information: 2020 Chevrolet Malibu VIN: Mileage:

Filed May 5, 2026 · Brakes · MO

To Whom It May Concern, ​I am writing to formally report a critical safety defect regarding my 2020 Chevrolet Malibu. This defect resulted in a life-threatening incident while I was driving on the highway, during which my vehicle failed to stop as required. ​While operating at highway speeds, the brake pedal became extremely hard to depress, making it nearly impossible to decelerate or bring the vehicle to a complete stop. This sudden loss of power assist forced me to manage an incredibly dangerous situation in high-speed traffic. Based on the symptoms, I am concerned that the brake booster vacuum pump has suffered an internal failure, a documented issue for this model year where oil sludge or debris causes the pump to seize. ​In addition to the physical resistance of the pedal, I am concerned about the reliability of the Electronic Brake Control Module (EBCM). The failure experienced on the highway demonstrates that this vehicle is unsafe for public roads, as the force required to engage the brakes in an emergency is far beyond safe operating standards. ​I request that the federal safety agency investigate this brake failure and determine if a mandatory recall is necessary to prevent similar incidents from resulting in catastrophic collisions. ​Please contact me if you require further information Thank you [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 27, 2026 · Brakes, Engine · AL

I am writing to report a serious and dangerous issue that occurred with my 2020 Chevrolet Malibu LT on April 27th 2026. While driving on the interstate after work, my vehicle suddenly experienced a failure that made it extremely unsafe to operate. The brake pedal became extremely hard to press, and the vehicle did not want to slow down or stop properly. This created a very dangerous situation while I was driving at highway speeds. Additionally, I noticed that nearly all of the engine oil was gone, which is extremely concerning and may be related to the failure. Based on these symptoms, it appears the vacuum pump may have failed while the vehicle was in motion. This issue placed me at significant risk of an accident and could have resulted in serious injury. I am requesting an immediate investigation into this matter and assistance with repairs. I would also like to know if there are any recalls, known defects, or extended warranties related to this issue. Please advise on the next steps as soon as possible, as the vehicle is currently unsafe to drive.

Filed Mar 24, 2026 · Brakes, Engine · GA

While driving the brake pedal became hard to push out of no where. Once the car got to the shop it stopped cranking. The shop is stating that the brake vacuum pump is the cause of the brake pedal messing up, and that it also caused other engine damages estimating $3000.00