2024 Chevrolet Blazer

On April 11, 2024, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE24011 after receiving complaints concerning a loss of brake assist in 2023 MY Cadillac Lyriq vehicles. These complaints allege a hard brake pedal, followed by a “Brake System Failure” message at start up or while driving. GM shared records regarding several internal investigations for loss of brake assist due to alleged spindle fractures in the eBoost system. GM has stated that in the event of a spindle fracture, anti-lock brakes (ABS), stability control, and traction control remain functional until the vehicle comes to a complete stop. At this point, ABS, brake assist, stability control, and traction control functions are lost. The loss of these functions causes the vehicle to set one of three Diagnostic Trouble Codes (DTCs) based on failed performance criteria for the Electronic Brake Control Module (EBCM). These DTCs, in turn, activate several driver alerts: an audible chime, a visual “Service Brake System” message in the display, and multiple illuminated Malfunction Indicator Lights (MILs) for the ABS, Traction Control, and Brakes informing the driver of loss of functionality. The vehicle speed will also be limited to 70 KPH (43 MPH). Since opening PE24011, ODI has continued to receive reports of loss of brake assist. Some of these reports describe symptoms inconsistent with GM’s description of a spindle failure. These reports allege an immediate loss of brake assist functionality as opposed to the loss occurring after the vehicle comes to a complete stop. The sudden loss of brake assist during a braking event could result in extended braking distance, which increases the risk of a crash or injury. ODI believes further analysis is necessary to assess the potential for failures in GM’s eBoost system to resulting in safety-related outcomes. At this time, ODI is aware of the following vehicles that are equipped with this eBoost system: 2023-2026 MY Cadillac Lyriq, Chevrolet Colorado, and GMC Canyon; 2024-2026 MY Buick Enclave, Envision; Chevrolet Blazer EV, Equinox EV, Traverse; Cruise Origin; and GMC Acadia; 2025-2026 MY Cadillac Celestiq and Optiq. ODI is also aware of 2024-2026 MY Acura ZDX and 2024-2026 MY Honda Prologue vehicles that were built with this system. The Acura and Honda vehicles were manufactured by GM in a joint venture with Honda, and will be included in the Engineering Analysis as peer vehicles. ODI is opening this Engineering Analysis to further assess the safety-related consequences of a failed eBoost system. In addition, ODI is expanding the scope of the investigation to encompass all GM vehicles that share this eBoost system. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Radiator replaced. 39000 miles 2years and 7 months old. Took car in for oil change and was told radiator had large leak. It would have to be replaced $1900.00 After speaking with GM the price was 920.00.

NHTSA ID

11776728

Incident

Sep 15, 2026

The electronic charge port door locked up, which completely prevents access to the charge port unless you break the panel off. This component breaking is commonly-reported and Chevrolet does NOT offer a mechanical alternative. Repairs are covered by warranty, but when the warranty expires, I presume they will not cover it anymore. In that case, litigation might be necessary.

NHTSA ID

11776663

Incident

Nov 1, 2026

I entered my vehicle started like normal was heading home when I got in the highway while gaining speed to get on the highway I hit about 60-65mph when my entire car went black my odometer screen went black my entertainment system went black all lights shut off and my car was just rolling I immediately tried to get off the highway and take a video when I got off the roadway everything came back on

NHTSA ID

11775575

Incident

Oct 27, 2026

The Charging Port Door and assembly broke during a public charging station while on vacation. I had to manually pull it down which stripped the plastic gears. The door had been previously aligned because it was not flush with the body under warranty. This overcomplicated mechnical, electrical door is a subject of numerous complaints on blogs. It can be stuck causing the inability to charge the EV, leaving people stranded. Before I took it to the dealer it was hanging off the side of the vehicle which causes a safety issue and could be torn off at a car wash getting water into the high voltage electrical socket. This occured while on vacation under the 36K bumper to bumper warranty but couldn't get it into the dealer until 36.5 miles and I face a repair bill of $674.77 for something that is poorly designed with numerous failures and had been already addressed under warranty.

NHTSA ID

11774651

Incident

Oct 15, 2026

Since picking up the car almost two years ago the battery cooling fans have been actively blowing shredded internal insulation, forcefully discharging mass quantities of airborne fiberglass-like micro-fibers both internally into the cabin and externally into my residential garage and home. The vehicle is completely intact, unaltered, and available for immediate federal, independent, or manufacturer inspection upon request. My safety and physical health were put at severe risk due to chronic inhalation and skin exposure to high volumes of airborne, jagged, fiberglass-like microfibers blasted directly into the passenger cabin and my residential garage. This heavy environmental particulate exposure triggered a severe, ongoing escalation of my pulmonary disease that required heavier high-tier medications and caused a violent flare-up of an underlying autoimmune condition. The problem has been reproduced continuously and confirmed by my residential building's professional maintenance team. They conducted an official environmental inspection of my apartment, formally concluding that there is no structural or building source for the material, isolating the vehicle as the sole point of origin. The vehicle has been evaluated by General Motors' corporate division. Based on a plethora of underlying mechanical and safety failures, GM has formally acknowledged the vehicle's defective state and has officially authorized a statutory Lemon Law buyback. There were no digital dashboard warning lights or error messages prior to the issue. The initial symptoms appeared immediately after delivery in March 2025, presenting as an unidentifiable, aggressive gray/white fibrous dust coating the vehicle interior, clothes, and garage, which worsened exponentially over the timeline of vehicle ownership as the something continued to disintegrate the internal insulation panels. This was notified to Chevy almost immediately after picking up the car. I have photo and video showing the issue.

NHTSA ID

11774562

Incident

Mar 25, 2025

Auto hold was on, radar cruise control was set and as I was merging in traffic a sharp smell of burning started. The cruise control refused to disengage until I parked the car in garage. Eventually burn smell ended but seems like brake was stuck while acceleration causing a burn smell. It seems like brake could get stuck to wheels perhaps when auto hold is on even when driving? Auto break hold is a feature which keeps the break on while car is stopped.

NHTSA ID

11773103

Incident

Oct 22, 2026

the car jumped/jerked like it was trying to change gears while accelerating and two times when at a complete stop at a light. The car was taken to dealership on Sep 2, 2025 and needed a full transmission replacement. The parts were on back order and the vehicle was not complete until November 20th of 2025

NHTSA ID

11770515

Incident

Sep 2, 2025

This morning, I stopped to open the gates at work, car was idling. When I got back into the car, put it in drive and started to slowly move forward the FORWARD COLLISION SYSTEM slammed on my brakes and lights flashing on my dash. I backed up...there was absolutely nothing in my way. This has happened numerous times, different places and while turning a corner at a very slow speed. Never nothing in the way. Will definitely be taking it in to have it checked now.

NHTSA ID

11769251

Incident

Oct 6, 2026

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3

PI created to guide technicians through radio restriction process

Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator.

This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently investigating.

This Preliminary information communicates to dealers a procedure to reset the radio.

This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.