Service Brakes Problems of Chevrolet Blazer - part 1

The vehicle accelerated without input and the brakes failed to respond. I am notifying you that this vehicle is a life-threatening safety risk and should not be rented again until a master technician clears the electronic throttle control and breaking system. This condition presents a serious safety risk and could lead to a car crash or injury. Additionally, the vehicles, climate control system behaved erratically, alternating between extremely hot and extremely cold air without adjustment. This may indicate a broader electronic or system malfunction affecting vehicle city.

See all problems of the 2025 Chevrolet Blazer 🔎.

On two separate occasions the vehicle lost all power while driving. On December 5, 2025 turning on to a main road from parking lot the vehicle shut off with no prior warning lights. Shifted vehicle to park. No power to anything, unable to unlock doors, unable to turn on hazard flashers, stuck in the middle of the road at night. Waited a minute and pressed the start button and vehicle started with no problem. Again, on February 24 , 2026 making a left turn in intersection, without any warning the vehicle shut off… no power at all. Stuck in middle of road with no lights , no hazard flashers ,unable to get out of the car. Few minutes later vehicle started again. The vehicle did not stall while stopped, it completely lost power while moving. Reported problem to west herr Chevrolet of hamburg NY , brought vehicle in to dealership on February 25, 2026 and they were “unable to duplicate the concerns” the dealership paperwork states that the vehicle stalled while stopped, this vehicle lost all power while it was moving. We now have the vehicle back in our possession but are extremely concerned for our safety and the safety of others.

Chevy of wasilla, ak did not properly inspect a safety recall for the rear parking brake harness. After I showed the dealership the pictures of the holes in the brake harness, I was told that the holes in the brake harness is a feature to let water out. Pictures are attached of said holes in brake harness and text message with dealership representative.

See all problems of the 2024 Chevrolet Blazer 🔎.

On December 22, 2025, I purchased a brand-new Chevrolet Blazer ev ss from a dealership located approximately 1 hour and 10 minutes away from my home. Immediately after leaving the dealership lot, I noticed a grinding / grunting noise coming from the vehicle. This was not a minor rattle or normal “new car” sound—this was an alarming mechanical noise in a vehicle that had just been sold to me as new. Because the selling dealer is so far away, and because I was concerned about driving a potentially unsafe vehicle long distance, I took it to a closer Chevrolet dealer for evaluation. I first brought the vehicle to ciocca Chevrolet in west chester, PA. After assessing the issue, they advised me to open a ticket with general motors (gm) because they believed there was a legitimate defect that required gm involvement. Shortly after that, I left for the christmas holidays, but the issue did not go away and I remained extremely concerned that I had just bought a defective vehicle. When I returned, I took the Blazer ev to del Chevrolet in paoli, PA for a second opinion and a thorough evaluation. After keeping the car and spending an entire day assessing it, del Chevrolet acknowledged the problem. Despite two separate dealers identifying and acknowledging the issue, I have been unable to get timely action toward a repair. I have been told that gm is requiring additional testing and, most importantly, that gm is not authorizing del Chevrolet to order the necessary parts. The dealership has indicated they are essentially stuck waiting for gm approval, which means my brand-new vehicle is in limbo with no clear repair timeline. As of now, the vehicle has only about 140 miles on it. This is a brand-new car that developed a serious noise immediately upon delivery, and I have now been forced into a loaner vehicle. It is Jan 17th. The vehicle is still at del Chevrolet service center. Del Chevrolet, fred beans Chevrolet and gm corporate are involved in resolving this issue.

At a low speed, between 10 and 15 mph, the forward collision system automatically triggered and brought the car to an immediate stop. While we were lucky that no car was following behind us, the passenger and I experienced significant whiplash and lasting back pain as a result of this. The vehicle has not been inspected by anyone, and not been reproduced. The forward collision system flashed (red warning light, alert).

We are noticing the coolant meter seems to be stuck on c, the ac is not blowing cold and we are getting a message that action required steering assist is reduced, drive with caution. Today the brakes slammed on by themselves and almost sent my wife thru the windshield. Luckily she was in a clear area with no other cars around.

See all problems of the 2019 Chevrolet Blazer 🔎.

The car due to the parking brake system recall lost control, the brakes would not stop and caused the vehicle to crash into 2 parked cars, landing on top of the 2nd vehicle which was a pick up truck.

On 10/29/25 I brought the vehicle in to richard lucas Chevrolet due to the alert from my insurance CO that there was a recall with parking brake system. The dealership checked the car and told me they had to order the part that was needed due to the recall. Prior I also made the dealer aware that the car had recently stalled on me in the middle of the street, I was told by the dealership that this was apart of the recall! the dealership allowed me to drive the car and stated to me that they would call me when the part comes in! 2 days later on 11/1/25 while driving the car lost control, the brakes wouldn't stop and I crashed into 2 parked cars and landed on top of the second parked car which was a pickup truck! all of the airbags deployed and my body is pretty messed up from this horrific crash and this has caused fear in me of driving!.

Incident description: while my wife was driving our 2022 chevy Blazer at approximately 40 miles per hour, the vehicle’s dashboard suddenly went dark and became unresponsive. Multiple warning lights illuminated simultaneously, including the check engine light, abs light, and other system alerts. The dashboard appeared to flicker as though it was repeatedly shutting down and restarting. When the brake pedal was applied, it offered no resistance and traveled completely to the floor without slowing the vehicle. To bring the vehicle to a stop, my wife shifted into neutral and allowed it to coast until it came to a complete stop. Fortunately, there were no intersections or other vehicles in front of her at the time, preventing a potential accident. This incident raises serious safety concerns, as both electrical and braking systems appeared to fail simultaneously.

See all problems of the 2022 Chevrolet Blazer 🔎.

Shift to park issue. Vehicle shifts into park but does not register as such. Therefore, the vehicle keeps running and will not turn off or allow you to exist the vehicle. This is already a know issue with certain gm vehicles as is evident by a recall and service bulletins. However, none of those include the 2020 chevy Blazer.

See all problems of the 2020 Chevrolet Blazer 🔎.

When I try to park the car, it says shift to park. Sometimes I can’t get the car to go into park to exit the vehicle or other times. I’ve shut the door and it has stayed on with the accessories because it won’t shut off.

1. Vehicle has a horrible squeaking sound coming from the brake pedal area. First dealer diagnosed it as the master cylinder needing replacement. Noise did not go away and gm said that it is normal. The noise is not normal and has never been on any other car I have owned. 2. When reversing, the car sometimes abruptly slams on the brakes as if it is avoiding a collision even though no collision is close to happening. Gm refuses to fix the problem.

Accelerating without pressing gas pedal and gas pedal won't release with braking. Brakes overheated and this went on 10 minutes before I got it to release the gas pedal so I could safely stop. I almost hit 4 vehicles on the interstate because the gas pedal went to the floor all the sudden.

Brake booster failed after 50k miles needing repair. Brake became very still, prolonging the time it takes to stop the vehicle.

See all problems of the 2021 Chevrolet Blazer 🔎.

My windshield is defected with no real time when a replacement can be ordered. . The interior lining is not sealed properly which is causing a buckling effect by drivers and passengers visors. . Rain is getting inside and soaking into the dashboard causing the electrical system on screens to blink in and out finally my brake harness is still on recall and my car has been shifting into park which could cause severe problems if I am on the highway. .

The contact's father owns a 2013 Chevrolet Blazer. The contact stated that while his father was driving at approximately 40 mph straight forward, the brake pedal was depressed, and it traveled to the floorboard. Then, the brake pedal was lifted, and the brake pedal traveled a second time to the floorboard. The vehicle did not slow down as intended, and the vehicle crashed into the rear of another vehicle. The air bag did not deploy, and no warning lights illuminated. The contact's father sustained a facial bruise. Medical attention was not needed. A police report was filed. The vehicle was towed to a lot where it was pending an inspection from the insurance company. The manufacturer was not notified of the failure. The failure mileage was 34,000.

See all problems of the 2023 Chevrolet Blazer 🔎.

The vehicle has engaged the brake on multiple occasions unexpectedly. This is related to the recent recall that gm announced and is unable to repair. I have made multiple attempts to reach gm through written mail, phone, x and the bbb and have not received a satisfactory resolution as the safety issue persists.

Car can spontaneously activate the parking park. Recall has been ongoing and chevy has yet to tell me how to repair it. They said risk for a severe accident is high.

The contact owns a 2022 Chevrolet Blazer. The contact stated that upon stopping at a red traffic light, the vehicle's auto start/stop system activated and turned the engine off. The warning message "brake system failure - esc- steering assistance reduced". The driver was able to pull to the shoulder of the roadway and turn the vehicle off. Upon restarting the vehicle, the vehicle returned to normal functionality, but the failure recurred. The check engine warning light was illuminated. The vehicle was not diagnosed or repaired by the dealer or an independent mechanic. The manufacturer was notified of the failure, and a case was filed. The contact was referred to the NHTSA hotline for assistance. The failure mileage was 121,000.

My name is [xxx] and I was a passenger in our 2021 chevy Blazer with our young child in the back seat when the brakes suddenly failed while we were driving on the freeway. The brake pedal went stiff and wouldn’t respond. It was terrifying — we truly felt like we were going to crash. I was panicked, and my child was crying. Since then, I’ve been too afraid to drive or ride in this vehicle, even if it gets repaired. This isn’t the first issue with the car, and gm has not resolved it in a timely or helpful way. The vehicle is currently at the dealership and we are paying for a rental car out of pocket. I’m reporting this because I believe this vehicle poses a serious safety risk to families like mine. I’m asking NHTSA to please investigate this issue before someone gets hurt. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While driving my 2021 Chevrolet Blazer lt on the freeway with my wife and child, the “brake assist” warning came on and the brake pedal suddenly became extremely stiff. I was going about 65 mph, and it became difficult to slow down safely. We were terrified. This created a serious safety hazard, as I almost couldn’t stop in time and could have caused a crash or gotten someone killed. The check engine light came on as well. I had previously taken the vehicle in for a similar rattling or braking noise back in 2021 and was told it was “fine. ” now the issue seems to have gotten worse. I have since learned that other owners have reported similar brake assist issues on 2021 Chevrolet Blazers, and it appears there are service bulletins but no recall yet. I am extremely concerned that gm has not addressed this defect, especially since it happened without warning and endangered my family’s lives. I am requesting a full investigation into this issue and for gm to take full responsibility for the repair.

Brakes bottomed out. Message on my dash board said “brake system failure reduce speed to 62” and the brake went on the way to the floor.

2023: 16k miles, the Chevrolet Blazer in questions transmission went out; thus requiring it to be brought into the dealership for repair; it was "repaired" and given back to us. A few days after said repair, I was driving it with my son in the vehicle, and the transmission went out while on the highway. I was almost hit from behind as I limped it to the side of the road. A brand new transmission was put in. During this time, there was also issues with the brakes where they were making noises. 2025: Blazer check engine light came on. On the way to get it diagnosed, it began to overheat; we were limping it to the side of the road when it stated "engine overheating, vehicle turning off". The safety system for shutting down when overheating worked, however, I was in the roaad again. Thus putting me in danger of being hit. We just received notice from the dealership that it is (as of this moment) a cooling fan, ac pressure switch, thermostat, and a cracked radiator. We are waiting on the technicians to finish checking it to see if there are any other issues.

I am not comfortable with this car, I took this car to the dealership to get fixed and checked on recalls but they could not fix the most important and most dangerous recall. They worked on recall#n252492430 and recall #n242468490 from frank villasenor # (056) 750027017. When I got there, no one gave me an update of the car they only gave me a receipt with 3 pieces of paper and that is it. What can I do in this case? I can not drive this car knowing the brakes will go out and I might have an accident and crash.

After getting the recall repaired (which I was never informed of and I had the parking brake engage as I was travelling 30 mph causing me to skid down the road) I got the vehicle back and the very next day it was the same issue and the abs and traction control light came on and it began making loud clicking noises every time I would engage the brake.

My 2021 Chevrolet Blazer experienced brake failure while driving, without any warning lights or diagnostic alerts from the vehicle’s onboard system prior to. This created a very dangerous situation for myself and others on the road, including my family who was in the car as well. Prior to this incident, I brought the vehicle to the dealership not long after purchasing it because I was constantly hearing screeching noises when braking. I thought it was rather soon to need new brakes, considering I purchased the vehicle brand new, but the issue was dismissed without any further inspection. This most definitely resulted in a missed opportunity to diagnose what is seemingly a more well known mechanical failure common among gm manufactured parts. After the brake failure, service technicians discovered that the vacuum pump had failed, causing the brakes to fail which led to engine damage by projecting shrapnel into the engine. This has rendered a $35,000 car purchase useless after 4 years of use without a $10,000 repair. I find this highly unethical. Upon further investigation, I learned that gm has previously acknowledged vacuum pump failures in several vehicles manufactured between 2014–2018 and even recalled certain models. The 2021 chevy Blazer should be included in the list because failures of this part can lead to harm, injury, or loss of life. The documented defects in older gm models is consistent with my experience. I got oil changes and service regularly. The dealership should not have been so quick to dismiss the the brakes, knowing the history of these parts and the warning signs. This issue should be taken seriously as it is likely more widespread and is a ticking time bomb. Loss of life should not be the catalyst to trigger action in this situation. Other consumers are likely at risk without knowing it.

I am reporting a serious safety concern involving my 2021 Chevrolet Blazer, which experienced brake failure while driving, without any warning lights or diagnostic alerts from the vehicle’s onboard system. This created a highly dangerous situation for myself and others on the road. Prior to this incident, I brought the vehicle to the dealership after consistently hearing squealing or screeching noises when braking. The issue was dismissed and attributed to a change in federal regulations limiting the use of copper in brake pads—without any further inspection. This resulted in a missed opportunity to diagnose what appears to be a deeper mechanical failure. After the brake failure, service technicians discovered that the vacuum pump had failed, which impacted braking performance and also caused engine damage. While I’ve since learned that gm has acknowledged vacuum pump failures in several vehicles manufactured between 2014–2018 (via formal recalls), the 2021 chevy Blazer is not currently included in those campaigns however, the symptoms and outcome I experienced are strikingly similar to the documented defects in older gm models. The lack of early diagnostic detection, coupled with dealership dismissal of clear warning signs, signals a potential emerging safety defect in this newer model that may not yet be officially recognized. Given the safety-critical nature of the braking system and the failure of both mechanical and procedural safeguards, I strongly urge NHTSA to investigate whether this issue is more widespread in recent gm models, including the 2021 Blazer. Other consumers may be at risk without knowing it.

Car slams on brakes randomly. If the cannot sell or dealer trade these vehicles, why r they permitted to allow us to keep driving a dangerous vehicle. My service manager is at a total loss , and this auto is dangerous.

I have been waiting for months for my recall to be completed. My dealership has been waiting for the parts from gm and they still haven’t received them. I’m not sure when the recall was initially issued but I contacted the dealership about it as soon as I was aware of it. That’s how long I’ve been waiting. 1 unrepaired recalls associated with this VIN Jun 25,2025 manufacturer recall numbern252503010 NHTSA recall number25v433 recall statusrecall incomplete.

This has happened to me numerous times where I’m driving and out of nowhere the car shortstops it is a danger to drive this car. And I have called gm over and over and they don’t want to do anything about it.

The vehicle’s brakes failed while I was driving. I was luckily able to steer the vehicle off the road narrowly avoiding hitting another car. We had the vehicle towed to a chevy dealer and they told us the fault was due to a low voltage battery. They would also not drive the vehicle until the battery was replaced because it was giving an error message of “brake system failure”. The dealer is the only place that has inspected the vehicle at this time. The warning messages appeared at the time of failure and not before. I find this to be a manufacturing defect in need of a recall as this could have easily caused harm or loss of life.

On April 7, 2025 while backing out of the driveway, my son's car abruptly stopped. The manhole cover at the end of our driveway triggered the emergency braking system. My head was slammed against the headrest and caused a great deal of pain in my head. On April 15, 2025, I went to kaiser and was told that I have a concussion.

This problem is with a 2023 r/s/ awd Blazer: when there is wet slippery snow, and I apply the brakes normally the system immediately goes to rapid clicking of the abs system activated on the front brakes and I hear no clicks from the rear wheels. From the time of the abs being activated the front wheels go into a slide and the rear wheels only roll along with no braking action as I have opened my driver's door and watched the driver's rear wheel while activating the brakes. I have been to the dealer two times, and they find nothing wrong. I found on the internet one other person complaining with the same issues as me on a 2021 r/s awd Blazer. When this happens, it is a accident waiting to happen situation.

Addition to case #[xxx] read the following response from Chevrolet care at the end of this email about my braking problem. Take note that Chevrolet is admitting that in a case like mine (wet, slippery snow conditions) I only have basically two wheel braking and those two wheels (tires) are sliding during the complete stop. This happens when driving in town (20 -25 mph) the rear wheels as Chevrolet says have a drag effect, (basically no braking) Chevrolet has created a crash hazard with this over engineered braking system when used in wet slippery snow conditions. Thank you [xxx] see enail from Chevrolet cares hello [xxx], thank you for your patience and for providing this information. We received an update from your dealership, bergstrom Chevrolet of manitowoc, who advised the following: the system is functioning as normal. Brake pad thickness was measured at 8mm on all 4 wheels. The abs system doesn't activate on all 4 wheels unless there is a total loss of traction across all four wheels which would indicate a total loss of control. With two wheels activating and the rear wheels still spinning is allowing for the retention of control by allowing for braking to the rear wheels but at a lesser degree to create stability and drag (braking) to maintain control and steering capabilities during the loss of traction at the front end. The abs system does allow for the adjustment of braking power to specific wheels in an effort to maintain proper traction and steering prior to the emergency systems engaging in the event of a slide. The dealership is our eyes and ears on the ground, and I will stand by their judgement. However, if you feel strongly against the dealership's judgement, it is to your discretion on what dealership you would like to work with. Please note, this does not guarantee a different resolution. Please let me know if you wish to visit another gm location for further assistance, we're here to help. Tea Chevrolet customer care information redacted pursuant to the freedom of information.

Multiple safety-critical malfunctions have occurred on this vehicle involving unintended braking, unintended acceleration, and false activation of driver-assist systems. These events did not happen at the same time and occurred under normal driving conditions. At various points, the vehicle has suddenly applied the brakes without driver input, including hard braking events that felt like an automatic emergency braking activation when no hazard was present. In separate incidents, the parking brake has engaged while the vehicle was in motion, causing abrupt deceleration. There have also been instances of unintended acceleration where the vehicle surged forward briefly without additional throttle input. These malfunctions appear to be related to electrical or adas system faults affecting braking logic and propulsion control. No warning lamps or messages reliably appeared before these events. The issues pose a serious risk to the safety of the driver and others because the vehicle’s behavior is unpredictable and can interfere with safe control. The dealership was unable to reproduce the conditions during inspection, but the incidents have occurred multiple times in real-world use.