Table 1 shows one common engine and engine cooling related problems of the 2023 Chevrolet Blazer.
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems |
Vehicle safety defect complaint – 2023 Chevrolet Blazer to whom it may concern, I am submitting a formal safety defect complaint regarding my 2023 Chevrolet Blazer. This vehicle has exhibited multiple system failures that present a serious risk to driver safety and public roadway safety. The vehicle was purchased new on July 20, 2023. Beginning on April 21, 2025, at approximately 27,610 miles, the vehicle developed a progressive defect initially presenting as oil-related issues. Despite multiple repair attempts, the condition worsened and required a full engine replacement in January 2026. Following the engine replacement, the vehicle continued to experience critical safety failures, including engine stalling, reduced engine power warnings, and electronic stability control (esc) alerts. On April 26, 2026, the vehicle experienced a driver assistance system malfunction in which it attempted to steer off the roadway. I was forced to manually disable the system to maintain control of the vehicle. On April 27, 2026, the vehicle exhibited a fuel system failure, including fuel leakage and fuel odor, along with multiple simultaneous warning indicators: • reduced engine power • service esc • steering assist reduced / drive with care • power assist driver system disabled this combination of failures presents both a fire hazard and a loss-of-control risk. Additionally, I was informed by the dealership that a high-pressure fuel line, a one-time-use component, was not replaced during the engine installation. This raises concerns regarding improper repair and continued unsafe operation of the vehicle. The vehicle has undergone multiple repair attempts and a major powertrain replacement, yet continues to present serious safety concerns. Due to these ongoing issues, I do not feel safe operating this vehicle. I respectfully request that NHTSA review this matter for potential safety defects that may impact other vehicles of the same make and model.
The radiator developed a leak at around 36k miles and needed to be replaced. My understanding is that this is an ongoing problem with this vehicle.
Thermostat not working. Causing fan to run as if the vehicle is overheating.
I am writing to inform the appropriate authorities of the issues that I’ve continually had with my 2023 Chevrolet Blazer. It has come to my attention that the aforementioned vehicle will need a new transmission and possible engine repair currently totaling at just over 6,000 dollars in repair costs. When I was provided with the total repair cost I was informed by the certified service representative that this was a common issue for the Blazer model and that gm was aware of the ongoing issue. I’ve reached out to gm with my concerns regarding this vehicle and the fact that this is an issue that has in prior dates prompted recalls for Blazer models from the year 2020-2024. I have because of the transmission defects/ failures been stranded and unable to shift gears required for proper motion of the car. To which I am sure you can understand the public safety risk of an inoperative transmission. I have taken the car in for service concerning the transmission on 3 separate occasions within the last 10 days and was told by prior service technicians that “ no problems were visible” leading to the total breakdown of the transmission. I reached out to gm and told them of my wish to return the leased vehicle early due to my fears of now driving and operating the car and was told that I was not eligible for a buy back. Gm is maintaining its stance of no liability and I am seeking outside help from this governing agency to ensure that repair costs are fully covered for this defective product.
Oil leaking from the cam shaft carrier seal.
Transmission going bad car shakes and studders upon acceleration.
The driver-side half-shaft disengaged from the transmission. This caused a roll away of the vehicle when it is thought to be securely in "park" gear cuasing a frontal colisión.
The contact owns a 2023 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed and making a left turn, the vehicle unexpectedly came to a complete stop for several seconds, and then was able to continue driving. An unknown warning light was illuminated. The vehicle was taken to the dealer, but the cause of the failure could not be determined. The vehicle was not repaired. The failure recurred on several occasions. The manufacturer was not made aware of the failure. The failure mileage was approximately 100.
Vehicle having multiple stalls with abs light on while driving vehicle been at the dealership technician tried to repair it did not get fixed. Returned again stated that it was a wheel speed sensor. My vehicles been at the dealership for over two months now with no part eta. Multiple instrument cluster lights and vehicle stalls while driving.
I purchased this car in may 2023. Since day 1 one the car stalls after filling and out of nowhere. Can be sitting still or going down the highway and highway sped. I took it on snd they could not find anything. Was told to keep track of when it happens. After almost being rear ended several tons and being put in extreme safety I called them and took it back in . They have now had since 9/21/2023 saying they’re some kid of valve problem in the gas tank. So I am paying for a brand new car that is unsafe to drive and is at the dealer for who knows how long .