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 complaint #11743332 — an unverified report by a vehicle owner.
Montgomery, TX
FORWARD COLLISION AVOIDANCE: WARNINGS
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 complaint #11743332 — an unverified report by a vehicle owner.
While driving in a plaza parking lot at approximately 18mph the AEB engaged for no reason. There were not any objects near our car to activate the system. The AEB activated so quickly and abruptly that my spouse and I needed to seek medical attention due to whiplash.
NHTSA complaint #11736594 — an unverified report by a vehicle owner.
While driving, most often at dawn/dusk and commonly with cruise control engaged, the vehicle will falsely detect a vehicle ahead when none is present. It then triggers sudden Automatic Emergency Braking along with a crash/forward-collision indicator, causing an abrupt speed drop of 15–20 mph. This is a major safety concern for my family and me while commuting in our family vehicle. If a vehicle behind us follows too closely and does not brake as rapidly as this faulty feature activates, it could cause a severe rear-end collision, or the driver may swerve into the other lane and collide with other vehicles to avoid hitting my vehicle, which has suddenly decreased speed. Other safety concerns related to this faulty braking feature include passenger whiplash and strains when the vehicle suddenly decelerates, instability on wet/snowy/icy roads, and the loss of an important safety feature. This vehicle safety feature cannot be used due to faulty braking.
NHTSA complaint #11708602 — an unverified report by a vehicle owner.
Ponemah, MN
FORWARD COLLISION AVOIDANCE: WARNINGS
While driving, most often at dawn/dusk and commonly with cruise control engaged, the vehicle will falsely detect a vehicle ahead when none is present. It then triggers sudden Automatic Emergency Braking along with a crash/forward-collision indicator, causing an abrupt speed drop of 15–20 mph. This is a major safety concern for my family and me while commuting in our family vehicle. If a vehicle behind us follows too closely and does not brake as rapidly as this faulty feature activates, it could cause a severe rear-end collision, or the driver may swerve into the other lane and collide with other vehicles to avoid hitting my vehicle, which has suddenly decreased speed. Other safety concerns related to this faulty braking feature include passenger whiplash and strains when the vehicle suddenly decelerates, instability on wet/snowy/icy roads, and the loss of an important safety feature. This vehicle safety feature cannot be used due to faulty braking.
NHTSA complaint #11708602 — an unverified report by a vehicle owner.
I was pulling out of my parents' driveway with my sister, who is almost 7 months pregnant in the passenger seat. Before we could get down the driveway, my car VIOLENTLY slammed itself into park to the point that I was convinced I had to have hit someone. No warnings no nothing, just WHAM, causing my lower back to feel tweaked now. After jumping out and seeing nothing, I immediately brought my car to the dealership for inspection. When I arrived, I was told that the sensors are just too sensitive, and the gentleman helping me also has the same vehicle. He said his wife hates the car and turns off all safety features in order to drive the car. You want me to turn off all the safety features to prevent a crash because it is turning itself on and could cause one? I do not feel comfortable operating this vehicle with myself in the car, let alone the two very young nephews and my pregnant sister, who I frequently drive around. I have already brought the car in for this reason and they claim there is nothing they can do.
NHTSA complaint #11702715 — an unverified report by a vehicle owner.
Arlington, VA
FORWARD COLLISION AVOIDANCE: WARNINGS
This forward collision system will engage at inappropriate times when there is no crash concern. This vehicle has routinely engaged in a highway setting locking up the brakes and forcing the vehicle to a full stop on the highway with vehicles at speeds of 60+mph causing a grave safety risk and an immanent risk of serious injury or death from a serious highspeed crash. This software simply does not work and is not designed and programmed properly. It should not be on the road and shouldnt be used in a public setting. Each instance of my safety concern there was not a vehicle withing the proper distance that a crash was going to occur.
NHTSA complaint #11701686 — an unverified report by a vehicle owner.
This forward collision system will engage at inappropriate times when there is no crash concern. This vehicle has routinely engaged in a highway setting locking up the brakes and forcing the vehicle to a full stop on the highway with vehicles at speeds of 60+mph causing a grave safety risk and an immanent risk of serious injury or death from a serious highspeed crash. This software simply does not work and is not designed and programmed properly. It should not be on the road and shouldnt be used in a public setting. Each instance of my safety concern there was not a vehicle withing the proper distance that a crash was going to occur.
NHTSA complaint #11701686 — an unverified report by a vehicle owner.
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 complaint #11691578 — an unverified report by a vehicle owner.
Wayne, PACrash
FORWARD COLLISION AVOIDANCE: WARNINGS
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 complaint #11691578 — an unverified report by a vehicle owner.
Lakewood, NJ
BACK OVER PREVENTION: WARNINGS
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 complaint #11681127 — an unverified report by a vehicle owner.
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 complaint #11681127 — an unverified report by a vehicle owner.
Wichita, KS
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
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 complaint #11678714 — an unverified report by a vehicle owner.
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 complaint #11672830 — an unverified report by a vehicle owner.
Lake Elsinore, CA, CA
BACK OVER PREVENTION: WARNINGS
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 complaint #11672925 — an unverified report by a vehicle owner.
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 complaint #11655089 — an unverified report by a vehicle owner.
Vancouver, WA20 injured
FORWARD COLLISION AVOIDANCE: WARNINGS
Windshield has terrible glare and reflects the dashboard as to limit visibility. Front collision and auto braking including rear collision and braking are a safety hazard as they create hard braking events for no reason. Car will stop sudden for no reason. These are both serious safety issues. These are problems we have had with the car since purchase and have had the dealership shop work on the problem and were told just to leave it turned off. This is not the correct way to fix a problem with a vehicle.
NHTSA complaint #11655117 — an unverified report by a vehicle owner.
Windshield has terrible glare and reflects the dashboard as to limit visibility. Front collision and auto braking including rear collision and braking are a safety hazard as they create hard braking events for no reason. Car will stop sudden for no reason. These are both serious safety issues. These are problems we have had with the car since purchase and have had the dealership shop work on the problem and were told just to leave it turned off. This is not the correct way to fix a problem with a vehicle.
NHTSA complaint #11655117 — an unverified report by a vehicle owner.
Louisville, KY
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
I am writing to report a serious safety concern regarding the adaptive cruise control and rear cross-traffic alert systems in my Chevrolet Blazer. These systems are malfunctioning in unpredictable and potentially dangerous ways. On multiple occasions while driving on the expressway, the adaptive cruise control has abruptly and forcefully applied the brakes without any apparent reason. There have been no vehicles directly in front of me posing an immediate threat. While there may be traffic in adjacent lanes, my lane has been clear. This sudden deceleration is alarming and dangerous, creating a significant risk of rear-end collisions from vehicles following too closely. The red lights will come on and indicate an imminent problem but it is a malfunction. The abrupt stops are frightening for all passengers, and the frequency of this occurrence is troubling though on rare occasions since I have first owned the car. I have observed similar complaints from other Blazer owners on online forums, reinforcing my concern that this is not an isolated incident. The dealer has not being able to reproduce but acknowledges that other drivers have a similar issue. Further compounding this issue is the malfunctioning rear cross-traffic alert system. While backing up at low speeds, the system will unexpectedly and forcefully engage the brakes, even when there are no vehicles present in the surrounding area. While less dangerous than the expressway issue, this erratic behavior still indicates a significant system flaw. I understand that adaptive cruise control and rear cross-traffic alert are intended as safety features, but their current malfunctioning poses a substantial safety risk. I urge you to investigate this matter thoroughly. I expect these features to function correctly and reliably. I request immediate action to address these defects and ensure the safety of myself and other drivers.
NHTSA complaint #11648564 — an unverified report by a vehicle owner.
Louisville, KY
BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING
I am writing to report a serious safety concern regarding the adaptive cruise control and rear cross-traffic alert systems in my Chevrolet Blazer. These systems are malfunctioning in unpredictable and potentially dangerous ways. On multiple occasions while driving on the expressway, the adaptive cruise control has abruptly and forcefully applied the brakes without any apparent reason. There have been no vehicles directly in front of me posing an immediate threat. While there may be traffic in adjacent lanes, my lane has been clear. This sudden deceleration is alarming and dangerous, creating a significant risk of rear-end collisions from vehicles following too closely. The red lights will come on and indicate an imminent problem but it is a malfunction. The abrupt stops are frightening for all passengers, and the frequency of this occurrence is troubling though on rare occasions since I have first owned the car. I have observed similar complaints from other Blazer owners on online forums, reinforcing my concern that this is not an isolated incident. The dealer has not being able to reproduce but acknowledges that other drivers have a similar issue. Further compounding this issue is the malfunctioning rear cross-traffic alert system. While backing up at low speeds, the system will unexpectedly and forcefully engage the brakes, even when there are no vehicles present in the surrounding area. While less dangerous than the expressway issue, this erratic behavior still indicates a significant system flaw. I understand that adaptive cruise control and rear cross-traffic alert are intended as safety features, but their current malfunctioning poses a substantial safety risk. I urge you to investigate this matter thoroughly. I expect these features to function correctly and reliably. I request immediate action to address these defects and ensure the safety of myself and other drivers.
NHTSA complaint #11648564 — an unverified report by a vehicle owner.
I’ve been in pain for 3 days since the last time my auto braking slammed on the brakes. The situation this time was in the school pick up line, where there are 3 rows of cars and I was in the middle lane. This is a very slow progressing line bc each lane has one car move forward at a time and we then move forward and stop It slammed on the brakes so much harder than I would even have been braking in that scenario and I thought I’d been rear ended. It’s happened another time when I was in moving traffic and created a very dangerous situation which fortunately we did not end up causing a crash. I’ll be disabling the feature immediately as it’s much more dangerous than useful and I am in so much whiplash pain this time around it’s insane
NHTSA complaint #11641381 — an unverified report by a vehicle owner.
Johnson City, TN
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
The vehicle will automatically extremely hard brake while moving for no apparent reason, with no obstructions present. This problem startles driver and passenger and can present a danger to vehicle of being hit by other vehicles not expecting a hard braking situation for no apparent reason. Please investigate and make manufacturer responsible to fix the issue. Thank You
NHTSA complaint #11640032 — an unverified report by a vehicle owner.
The vehicle will automatically extremely hard brake while moving for no apparent reason, with no obstructions present. This problem startles driver and passenger and can present a danger to vehicle of being hit by other vehicles not expecting a hard braking situation for no apparent reason. Please investigate and make manufacturer responsible to fix the issue. Thank You
NHTSA complaint #11640032 — an unverified report by a vehicle owner.
Johnson City, TN
BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING
The vehicle will automatically extremely hard brake while moving for no apparent reason, with no obstructions present. This problem startles driver and passenger and can present a danger to vehicle of being hit by other vehicles not expecting a hard braking situation for no apparent reason. Please investigate and make manufacturer responsible to fix the issue. Thank You
NHTSA complaint #11640032 — an unverified report by a vehicle owner.
Socorro, NM
BACK OVER PREVENTION: WARNINGS
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 complaint #11638975 — an unverified report by a vehicle owner.
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 complaint #11638975 — an unverified report by a vehicle owner.
The emergency brakes engaging in reverse and while in drive. Not available for inspection as the vehicle is now totaled. It was involved in a rollover accident. I believe the emergency brakes caused the rollover. If the rollover was in fact due to the emergency brakes engaging, the accident could have happened on the highway, or a busier street putting several lives in danger. Thankfully, there were no other vehicles involved. The dealership as well as GM were notified of the issue. The dealership was unable to reproduce the issue, and returned the vehicle backed to us. Upon researching online, this is a known issue for the Blazer EVs. After the accident, the vehicle was towed as it was not drivable. The vehicle was then picked up by my insurance company, Progressive, and evaluated if the vehicle was repairable. It is not. The emergency brakes engaged previously to this event. Several times in reverse, then a handful of times in drive.
NHTSA complaint #11633358 — an unverified report by a vehicle owner.
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 complaint #11630427 — an unverified report by a vehicle owner.
This vehicle massively underperforming based on what was told to me at the time of sale (250–300-mile range), I have never come even close to that range. I am averaging about 125 miles using about 70% of the fully charged battery. I WAS informed that during colder temperatures I would experience faster battery degradation but it was not mentioned that it could be as dramatic as losing 50% of my range. I feel the mileage has been massively inflated to seem better situated to compete in today's EV market at the direct expense of consumers. In addition to the blatant falsehoods I have been told, the automatic emergency braking is seriously dangerous and primed to get people killed. In 6 months of driving, I have had no less than 4 separate experiences in which the AEB system engaged when there was not a vehicle or pedestrian infront or around my vehicle, engaging a full locked braked at speeds between 15 - 25 mph.
NHTSA complaint #11628737 — an unverified report by a vehicle owner.