2020 CHEVROLET MALIBU Service Brakes Problems

Vehicle vacuum pump failed I have changed it 4 times now. Saw there have been more cases

While driving the cars speedometer and all gages will stop working, or they will constantly move up and down on their own, it will also not accelerate to speed limit in a timely manner.. when stopping the car it will brake extremely hard on its own and throw me forward it will also give a warning message on the dash that the power steering isn’t working and to drive with caution. When parking the car and it is in park a message on the dash will appear saying shift to park.

My car has been malfunctioning it keeps saying shift to park when it’s park and it show esc system issue and then the brakes stop working it has been going on and off took it to Lou bachrodt Chevrolet and they couldn’t fix the issue. I have done research online and it shows the same

Shift to park. Im not able to park my car. W low miles. Chevy dealer stated not under warranty. Will cost 800+ to repair. Previous known problem (17-19). It was repaired my last malibu & was repaired under recall. Now a TSB has been issued by chevy for my 20 so they are aware. If they know it is a problem why is there not a recall? This happens often. Each time i park, I have to fight my gear shift & pray it eventually sticks. It does not seem safe. This is a new car & is unacceptable knowing the history. I can provide pictures or send estimate if needed.

Th e brakes are not working at all. We have to go slow then the brakes are hard to press. Th I s makes it keep driving anc brake pedal doesn't stop it.

A liAdjustmentght came on my dashboard. State power engine reduce period then it stalls when I press my foot down on the accelerator not giving it any power to go period then when I try to break it actually pushes my foot back off and it's hard to break period and when I press the start button to turn the engine on. It turns right back off after about.Maybe four or five seconds and no I just had to have a towed to my home. The special Coverage adjustment code in 182188250 is what my vehicle would apply to, but that code only covers the 2016 and 2018 models. What can I do now? Because it is under that code. But the dealerships won't cover it because they're saying my model is not but twenty twenty I need help please. I have 132k miles. Good condition. Why wouldn't letter models be covered under the same act?What would make it stop if it's doing the same thing?It did for those twenty sixteen and twenty eighteen models

Brake pedal hardened due to vacuum pump

I was driving in the interstate at about 4pm on May 16th and the check engine light came on. Thus is nothing new because since I bought the car on Feb. 14th, 2024 the check engine light is on about 75% of the time. I went to use my brakes and the pedal was hard as a rock. I had to use both feet to depress the pedal to get the car to slow down. I brought the car to Autozone and they did a scan and it showed the Power Brake Booster Vacuum Sensor needed replacement. I ordered it and had a friend who is a mechanic replace it and the problem still persisted. My friend thought it was the Power Brake Booster Vacuum Pump. I ordered it and he replaced it and the brakes are back to normal. My research regarding this has found that his is a VERY common issue with this vehicle which has lead to costly repairs for many people and has resulted in a class action lawsuit. This is a SERIOUS safety issue! When a person can’t hardly press their brakes when driving that endangers the lives of the driver, the occupants of the car and every other person on the road. Why do we have to wait for people to be killed before this is fixed?

Very hard to brake, like stepping on a brick. Have to start breaking way in advance. Also keep getting a "shift to park" alert and car won't shut down and can't get out of it sometimes.

The contact owns a 2020 Chevrolet Malibu. The contact stated that while driving approximately 45 MPH and approaching a stop light the braking system malfunctioned when pressing the brake pedal causing the vehicle to crash into the rear of a second vehicle. The contact indicated that the vehicle did not reduce speed when pressing the brake pedal and the collision avoidance feature did not activate. A police report was taken at the scene. The police officer also confirmed no skid marks at the crash site. During the crash, the contact sustained injuries to the left arm and right shoulder that did not require medical attention. Both the driver and front seat passenger of the second vehicle sustained undisclosed injuries and were transported to the hospital. The vehicle was towed away and later deemed destroyed by the insurance company. The cause of the failure has not yet been determined. The manufacturer was notified of the incident. The local dealer was not contacted. The failure mileage was 57,000.

Mileage: 57,000

I am writing to formally report a critical safety issue with my 2020 Chevrolet Malibu, which resulted in a severe accident and posed significant risks to my safety and the safety of The issue involves the brake vacuum pump, which failed while I was driving. The component is currently with the vehicle, which is stored in a parking facility, and is available for inspection upon request. The failure of the brake vacuum pump caused a sudden and complete loss of braking power while I was driving. This malfunction put my life and the lives of others at immediate risk. On the first occasion, in April, I narrowly avoided a serious collision. Four weeks later, I experienced a second instance of brake vacuum failure, which led to a severe accident. The inability to stop the vehicle safely was directly caused by this malfunction. I contacted General Motors (GM) in April 2024 to report the initial brake vacuum failure. At that time, the issue had not yet been reproduced or inspected by a dealer or service center. Following the accident, I have been unable to confirm whether GM or any other party has The vehicle and component have not been inspected by the manufacturer, police, or insurance representatives since the accident. I reported the issue to GM prior to the accident, but they have not provided any assistance or resolution. Prior to the initial brake vacuum failure in April, I did not observe any warning lamps, messages, or other symptoms indicating a potential problem. The failure occurred suddenly and without warning, making it impossible to anticipate or avoid. This situation is incredibly distressing, and I believe the brake vacuum pump defect poses a serious threat to public safety. I urge the NHTSA to investigate this issue thoroughly and take any necessary steps to ensure the safety of other drivers who may be at risk.

Faulty Vacuum pump caused catastrophic engine failure. The vacuum pump exploded cracking the cam shaft sending metal shards into the engine. $12000.00 to repair and mechanic will guarantee the work because the replacement vacuum is an only OEM part. I was having braking problems prior to the vacuum pump failing. The brakes would intermittently freeze up and I couldn't get the car stop and had to use the emergency braking system to stop vehicle. Car is still at shop I can't afford the repair and I'm am still paying finance company for car. I have a disabled child and am low income. This has put hardship on me as I live in an area that does not provide public transportation. I don't know what to do.

On [XXX] I was driving to work and my check engine light came on. Immediately after this I was completely unable to brake. My brake pedal became so stiff and impossible to press. I very narrowly avoided an accident. I had the car towed to an auto shop where I was informed that I had a vacuum pump failure that essentially exploded and destroyed my cam shaft and shot fragments of metal into my engine in the process. I was quoted over $12,000 in repairs. After receiving this quote I began searching online to find what could have caused this to happen. I stumbled upon a class action lawsuit for this EXACT same thing (plaintiff [XXX] ). In addition to the suit there were 12 PAGES of comments from other Malibu owners who have experienced similar issues with their vacuum pump and braking system. This issue is also noted on MANY car repair forums, Chevy owner forums, YouTube repair videos etc. Please note that when I received the check engine light on 9/5 this is the first and only time I had any indication of a potential problem with my vehicle. In the year and a half that I have owned the car there has never been any issues, warnings or check engine lights. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The problems listed in my vehicle are the following • U0073: Control Module Communication Bus A Off • U0100: Lost Communication With Engine Control Module • U0121: Lost Communication with Electronic Brake Control Module • U0140: Lost Communication With Body Control Module • P0700: Transmission Control Module Requested MIL Illumination I believe this is due to a bad design in the wiring. Also the electric brake vacuum broke which is a common problem.

engine misfire, shift to park and transmission

The brake pump in my 2020 Chevrolet Malibu LT 1.5 malfunctioned on 05/25/2024. My car had approximately 85,193 miles on the odometer when this occured. I was driving down the interstate on 05/25/2024 when I went to apply the brake pedal and it was completely stuck. I had to swerve into the grass on the side of the interstate to avoid collision. After I had the car towed home, I had a mechanic run a system diagnostic test on the car which showed an error/defective code for the brake pressure sensor.

Electrical issue , Continuously losing communication to EBCM causing the car to go haywire with warning lamps on the dash board and then it brakes on its own , while driving on the highway at high speeds. This is very scary and extremely dangerous and this could eventually cause a serious accident. This has been occurring for 3 months now. I’ve had the car serviced 3 times within the last 3 months , costing me a lot of money but with no real resolution. Problem has been confirmed by independent Mechanics , they stated the codes are a loss of communication to all control modules , they then reset / reprogram modules , which is only a temporary fix because it always happens again.

Brake vacuum pump locked up causing camshaft to twist and reluctant wheel to turn which damaged the engine. I'm being quoted $10,000 to fix which was actually $1,000 more to fix but they accidentally under quoted me and have to honor the original estimate. I don't have that kind of money and still owe almost $14,000 on the car.

I was hearing a grinding noise when applying brakes so i had a mechanic change my brakes. He said they didnt need changing but i had him change them anyway. The noise didnt stop but we wasnt sure why it was making the noise. While driving down the highway, the break pedal became to hard to press. At that point I was in heavy traffic and had to use my emergency brake system to avoid collission with multiple vehicles. Upon taking my vehicle to the mechanic it was observed the vacuum pump had broken inside the motor. After the mechanic changed the part and cleared the broken parts out of the motor, within 6 months my breaks are acting funny again making loud noises when applying brakes. I'm terrified to drive long distances.

I was driving down the hwy and all of a sudden, my engine lost power and my brakes harden. I could not brake and nearly lost my life and my sons.

UNKNOWN Coming off a ramp to slow down and brakes were hard. Have to press down to brake.

I purchased a 2020 Chevrolet Malibu with 38,000 miles. I experienced a faulty air vacuum pump (first experience was at 45,000 miles and was replaced in August of 2021, two months after purchasing the vehicle in June of the same year), and then the replaced air vacuum pump again in February of this year (2023). This issue being brake related was unsafe. I experienced an intermittent reduced engine speed message on dashboard, with immediate reduction of speed down to 20 mph or less while driving. This made me and others unsafe. I experienced brake booster failure, among other issues stemming from all aforementioned. The car is now said by dealership to have indication of an internal engine issue and affected PCV lines dealing with a defective orifice (Kiriacopoulos, et al. v. General Motors LLC, Case No. 2:22-cv-10785, in the U.S. District Court for the Eastern District of Michigan) The car remains at a dealership and has now been there for over 30 days. There was no warning lamps, messages prior to the air vacuum Pump/Brake booster issue. I got in the car to try driving, and it was hard to push the brake with foot, so for I knew something was wrong. In taking it in to service, was when it identified to be that issue. Those issues have been manufacturer inspected (dealership) and confirmed. I experienced these issues since purchasing the vehicle in June of 2021. I believe that GM knows of these issues and has put me at risk on the road, along with some other symptoms of the car failures that are also well documented, and that GM is aware of, with no recalls. These car parts/issues put me and others in further danger, the car's air vacuum pump and brake booster affecting car's ability to operate, damaging other parts (Johnson vs. GM).  Consumer rights to be protected and safe are at risk, not deserving to have faulty auto parts sold, further exacerbating issues with the car being dangerous on the road with defective brake related parts, and rendered inoperable.

Car demonstrates random full vehicle power loss while in drive mode both at stop and while actually in motion and driving. Vehicle had a catastrophic loss of all break power while going downhill. Luckily while leaving the Lincoln Memorial in DC driver was traveling slow enough and able to get vehicle stopped without immediate injury. Car brakes would not reengage without 3k repair to import/export value(see receipt). 2 days later check engine light returned. 2 weeks later dealer is still in discussion with GM to identify cause of engine failure.

Service ESC ABS I just had a 2009 Chevy Malibu and now a 2020 and I’m having the same exact issues loss of power steering braking and at first my gas gauge was off check engine light came on now today “Service ESC w ABS LIGHT” on dashboard

About 3 months ago, I started experiencing the shift to park problem where my car would turn off completely and would be still and solid but the car wouldn't register being in park.

While driving on many occasions the last incident happened Friday April 28th 2023. My 2020 Malibu lost all communication on 231 Hwy. All dash gauges went haywire power dropped on vehicle RPM was accelerated but vehicle speed would not change engine light and traction light came on. I then had to pull over brakes made a loud thud noise when stopping. Turned vehicle off sat for about 15 minutes and restarted my vehicle engine light was still on but I was about four miles from home turned my hazard flashers on and made it home. When the car loses power it gives me NO warning at all it just happens. I've taken it to both Chevy dealers in my area Mr. [XXX] at Gilland GMC Ozark, Al explained to me that yes he saw the codes where car lost power and because they couldn't pinpoint the problem GMC had to be called and he was told that GMC has a team of engineers working on the Loss of Control problem but at this time they don't know anything. I'm risking my life on every day driving this vehicle in which I do have an extended warranty on but they can't fix what they can't find but yet KNOW for Fact that there is a problem. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

This vehicle was purchased on February 10, 2023 under false pretenses, deceit, and fraudulent activities by Frank Leta Honda of Missouri. Frank Leta Honda and its Salesman failed to disclosed that this vehicle was in a major accident prior to me purchasing it. The front-end bumper and the front quarter-panel on the passenger side were damaged. This car was re-painted with non-factory paint, and it shows. Most importantly, the procedure and process required in painting a vehicle was not followed. I even questioned the salesman whether or not this vehicle was in a major accident, and the salesman said, "no." I had taken this vehicle to two professional auto body businesses, and two owners/auto body workers informed me without me asking that the vehicle had been in a major accident. Can you please give me a report on whether or not the previous owners of this vehicle reported an accident with this vehicle being involved in, and the original color of this vehicle. The dealer is calling it red. However, this vehicle is a deep dark burgundy.

The contact owns a 2020 Chevrolet Malibu E2. The contact stated that while at a complete stop at the stop sign, the auto START/STOP mode engaged, however the vehicle failed to restart upon releasing the brake pedal. The message "Engine Reduced Power" was displayed. The contact stated that the vehicle failed to restart after several attempts. The vehicle was towed to the dealer where it was diagnosed that the vacuum pump had failed and the camshaft reluctor was in improper position. The dealer diagnosed that the vacuum pump and camshaft needed to be replaced. The parts were replaced. However, the failure reoccurred while driving. The contact stated while driving at 80 MPH and merging lanes, the vehicle decelerated unintendedly and the message "Engine Reduced Power" was displayed. The contact was able to veer to the side of the road. The vehicle was towed to a second dealer, Vandergriff Chevrolet (1200 W Interstate 20, Arlington, TX 76017), who informed the contact that he would need to tow the vehicle to the first dealer to be repaired. The vehicle was not repaired. The manufacturer was notified of the failure and advised the contact to tow the vehicle back to first dealer for additional diagnostic tests. The failure mileage was approximately 55,634.

Mileage: 55,634

The contact owns a 2020 Chevrolet Malibu. The contact stated while driving 35 MPH and depressing the brake pedal to slow the vehicle, the vehicle stalled. The contact stated that the oil change service light was illuminated. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the vacuum pump and engine to be replaced. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 90,000.

Mileage: 90,000

This is an intermittent issue and hard to reproduce on demand. I have evidence in the form of multiple videos that may be provided anytime. Videos can be found here: https://www.dropbox.com/sh/zubc5ilgahayvxa/AABf3M1mLBikxQswv17Yn-YQa?dl=0 In the middle of driving on freeways, highways, or regular roads, the car will quickly slow down to a very low speed, around 5 mph causing other drivers to have to quickly swerve out of the way before wrecking into me. The power steering will also intermittently fail, as it becomes difficult to turn the wheel during these times. The car will also not accelerate at my will like it should at this time. Check engine lights will show up, as well as other warning notifications on the dash board. Some of the warnings include "Service Power Steering. Drive with Care", "Fuel Level Low", and "Service ESC". The car will also intermittently show all gauges in the zero/off/empty position. The car will also say "Shift to Park" when trying to turn it on, even though it is already in shift. I have sent the car back to the dealer 5 times to date and am about to pick it up again today as they have called me and said "it's ready" again. Each time they take the car, they do not address the issue. The first time I took it in, they just performed a recall repair for the camera and suggested the problem may be fixed from that. They claim they cannot fix something they cannot reproduce but I suspect they do not want to spend the time/hours/money it will take to figure out the problem since it is still under factory bumper-to-bumper warranty. It is still under factory bumper-to-bumper warranty but Monument Chevrolet in Pasadena TX refuses to repair anything and claim there is no evidence of the problem even though I've emailed them multiple videos of the problems happening. Auto Nation in Houston TX is who has the car now. It was recommended to me by General Motors to try another dealer. This is where I'm at currently with the situation.

P0556 code and brakes are hard to stop. 40,016 miles on the car

The brake pedal is hard. The car does not want to stop. The brake booster is not working. The car only has 40,000 miles

Speed reduced, reduced engine power , hard breaking and noise ,engine light one , all gages flash, service esc! On dash