2024 Chevrolet Blazer EV Brakes Problems

I am reporting a potential safety defect involving unintended automatic emergency braking/forward collision warning/brake-control behavior, reverse automatic braking, parking brake behavior, and driver-assistance/sensor calibration. Incident XXX ~11:15 AM, [XXX] driving 2024 Chevrolet Blazer EV ~20–25 mph on/near [XXX]. Vehicle displayed red collision alert and abruptly braked hard although the lane was clear; only a car was parked in a driveway on the right. Sudden braking created serious risk of rear-end collision/loss of control. Vehicle used for family transportation; toddler (~30.8 lb) had been in vehicle ~10 minutes before and family includes blind/visually impaired passenger. History of unwanted reverse emergency braking ~every 45 days: Jan 2026 near Crust Pizza Woodforest (backing up) and March 2026 at H-E-B 7988 FM 1488 Magnolia (backing out), jolting child in rear-facing car seat. Prior service at Keating Chevrolet Nov 12, 2025 (including recall/service for Unintended Parking Brake Engagement N252503010 and missing chassis harness plugs update) did not resolve unwanted braking. After June 10, AEB/front pedestrian braking/intersection collision braking were disabled as temporary safety mitigation. Vehicle removed from daily family use, available for inspection, and I request NHTSA review. Any inspection should preserve relevant braking/parking/AEB/forward collision/sensor data before any reset/update/repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11743332

Incident

Jun 10, 2026

The contact owns a 2024 Chevrolet Blazer EV. The contact received notification of NHTSA Campaign Number: 25V433000 (PARKING BRAKE); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure.

NHTSA ID

11715543

Incident

Jun 15, 2025

Vehicle suddenly braking on its own by fifth time since May 2025

NHTSA ID

11697276

Incident

Nov 3, 2025

My son was driving in stop and go traffic on I-95 and he rear-ended another car. No safety features activated: i.e. dash warning lights, audible noise, auto breaking. Last week I was at teh dealer for the recall that effected the Emergency Breaking system. Talking with the dealer some updated turns the auto system off, or otherwise adjust the settings that I have prior. Backing out of the driveway the car lock up the breaks when it sees my trash can, but not on the highway? The dash warning lights randomly light up with nothing in front of me. I know the system does not prevent every accident, but it seems to pick and chose what it warns about. It is more a hazard then a help in its present state.

NHTSA ID

11691578

Incident

Oct 4, 2025

See attached document for complaint. I am writing to formally notify you, pursuant to the California Song-Beverly Consumer Warranty Act (California Civil Code§§ 1790 et seq.), that my 2024 Chevrolet Blazer EV, VIN 3GNKDHRK4RSXXXXXX is subject to an active safety recall N252503010 for the parking brake system. GM has acknowledged the defect, but no genuine repair or remedy Is available. I have already experienced problems with the parking brake, which substantially impair the safety, use and value of the vehicle. Due to the severity of this defect, I have placed the vehicle at the dealership, Woodland Motors, and it will remain there until GM completes the buyback process. I refuse to drive it because it is unsafe. I further understand that GM has instructed the dealership to adjust the depth sensor as so-called remedy. This adjustment has no bearing on the parking brake defect and cannot be reasonably be considered a repair nor the taping of brake lines that they also instructed to do. It does not address the safety risk or brake failure or unintended activation. Under California Civil Code§ 1793.2, the manufacturer must repair any defect that substantially impairs the use, value, or safety of the vehicle within a reasonable number of attempts and within a reasonable period of time. Since GM has no remedy and cannot provide a repair, it is impossible to comply with this requirement. Accordingly, I hereby demand that GM immediately: Repurchase my vehicle for the full purchase price, including sales tax, registration, finance charges, and any incidental or consequential damages. In addition, I request GM immediately provide me with a loaner vehicle or GM-paid rental until this matter is resolved, as it is unsafe to operate my current vehicle. If GM fails to resolve this matter promptly, I will retain legal counsel and pursue all available remedies, including attorney's fees, court costs and civil penalties under California Civil Code §1794.

NHTSA ID

11688203

Incident

Aug 19, 2025

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.

NHTSA ID

11688118

Incident

Aug 1, 2025

The contact owns a 2024 Chevrolet Blazer. The contact stated that while driving at various speeds, the vehicle independently came to an abrupt stop, with the "Service Parking Brake" message displayed on the instrument panel. The vehicle was taken to a dealer, where an attempt to duplicate the failure was unsuccessful. The contact was informed that the failure was likely a user error and that no issues were found with the vehicle. The failure persisted, and the contact then received notification of NHTSA Campaign Number: 25V433000 (PARKING BRAKE); which the contact linked to the failure. The vehicle was taken back to a dealer for the recall repair. The contact stated that the repair involved the installation of an anti-abrasive tape around the wiring harness. The manufacturer was notified of the failure, and a representative was sent to inspect the vehicle. The Chevrolet Representative was later informed by the dealer that the brake lines were already taped prior to the recall and that no additional repairs were needed. The vehicle remained in the possession of the dealer because the contact was concerned about the safe operation of the vehicle. The failure mileage was unknown.

NHTSA ID

11681938

Incident

Oct 1, 2024

The contact owns a 2024 Chevrolet Blazer. The contact received notification of NHTSA Campaign Number: 25V433000 (Parking Brake); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure.

NHTSA ID

11681431

Incident

Aug 18, 2025

The contact owns a 2024 Chevrolet Blazer. The contact received a notification of NHTSA Campaign Number: 25V433000 (Parking Brake); however, the part to do the recall repair was not yet available. The contact stated that while reversing at 5 MPH, the rear parking brake independently engaged. No warning lights illuminated. In addition, the contact stated that while driving at 20 MPH, the vehicle had jerked with a sudden acceleration before the rear brakes had independently locked. Injuries were sustained. The contact sought medical attention for injuries sustained to his back, neck, and spine. The front passenger sought medical attention for whiplash and head injuries. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The failure occurred on several occasions. The manufacturer was not made aware of the failure. The failure mileage was approximately 28,989.

NHTSA ID

11681277

Incident

Aug 16, 2025

Mileage

28,989 mi

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.

NHTSA ID

11681127

Incident

Apr 16, 2025

The contact owns a 2024 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the vehicle abruptly came to a complete stop, after which the contact became aware that the parking brake had been engaged. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V433000 (Parking Brake); the VIN was included, but parts were not yet available. The manufacturer was not notified of the failure. The failure mileage was unknown.

NHTSA ID

11679894

Incident

Aug 11, 2025

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.

NHTSA ID

11679681

Incident

Jul 30, 2025

Multiple safety-critical systems have malfunctioned since shortly after purchase, continuing to this day. The most serious is the forward collision braking, which has triggered randomly during normal driving. These braking events have occurred on highways and surface streets, posing a serious risk if a vehicle were following closely. During arbitration, the manufacturer admitted this is a known defect with no current fix, yet continues to return the vehicle marked as “repaired.” Additional issues include: Adaptive cruise control failure Intermittent charging failures (won’t initiate or randomly stops mid-charge) Infotainment screen freezing or going blank Inconsistent air conditioning performance Rear hatch failing to open/close and requiring physical force Bluetooth audio that disconnects unless the vehicle is powered off for 15+ minutes These problems have been reported to two GM-authorized dealerships. One repair attempt at a second location was ignored in arbitration. I also contacted GM corporate multiple times directly, requesting support. My attempts were either unanswered or dismissed, with no action taken. Many concerns were labeled “unable to duplicate,” even when I provided documentation. No warning lights appear with braking or charging failures. Most issues temporarily resolve after a full power-down, suggesting a software or control system fault. The manufacturer participated in arbitration and acknowledged the unresolved defects, but refused to provide further oversight or assign a factory technician. The vehicle is available for inspection. I am reporting this because the problems are ongoing and impact safety, reliability, and functionality.

NHTSA ID

11678714

Incident

Nov 13, 2023

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.

NHTSA ID

11677434

Incident

Jun 3, 2025

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 [XXX] # [XXX] . 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. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11672925

Incident

Jul 11, 2025

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.

NHTSA ID

11672830

Incident

Jul 9, 2025

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.

NHTSA ID

11655089

Incident

Apr 7, 2025

When the Automatic Emergency Braking system is enabled, it will suddenly brake when in reverse even though there is no obstacle at the back. The braking is so sudden that it is painful. I reported it to the dealership but they never got back to me about a solution. I have disabled the AEB for now.

NHTSA ID

11638975

Incident

Jul 4, 2024

I have had the car for 3 weeks and twice it has slammed on the brakes for an instant at slow speed. Both times I was at least 20 feet behind another vehicle travelling at less than 10mph when the brakes locked up for an instant throwing me against the seatbelt very hard and bringing me to an emergency stop. The first time the stop was so hard I thought the car behind me had hit me but it had not. I thought maybe it was the emergency braking but there was no alert or warning as there usually is when the car warns me of possible collision. The last time I contacted OnStar and asked the run a diagnostic which they said came back with no errors. I have not taken the car to the dealer since i cannot reproduce the problem.

NHTSA ID

11630427

Incident

Dec 11, 2024

Complete brake failure 4 times in the first 450 miles. Can turns on and power brakes and not functioning. Clears after a restart.

NHTSA ID

11629136

Incident

Dec 5, 2024

Vehicle lost electrical functions while driving. Brakes and power steering failed.

NHTSA ID

11623325

Incident

Nov 2, 2024

While this vehicle was in motion the brakes suddenly stopped working. The brake pedal went to the floor with no braking. The screen read brake assist failure. Safety was at risk due to being unable to stop the vehicle until it slowed itself down. This could have resulted in a fatality. The vehicle is available for inspection upon request. The vehicle was towed to the dealership today and no answers have been provided. There were no symptoms or signs prior to the total brake failure. Other messages on screen read: one pedal driving disabled, parking brake disabled, rear parking assist disabled.

NHTSA ID

11606938

Incident

Aug 5, 2024

Ecs failure, brake assist failure. Car upon starting would not brake. Gave above stated error codes. Restarting car resolved issue temporarily. Video available of incident. Braking did not stop vehicle

NHTSA ID

11592832

Incident

Jun 5, 2024