2023 Chevrolet Blazer · Transmission & drivetrain
Powertrain defect may allow a vehicle rollaway
The transmission may have been built with an incorrect sun gear, which can result in the driver-side half-shaft disengaging from the transmission.
What the reviewed source says
Start with the documented condition, not a parts guess.
NHTSA campaign 23V172000 includes certain 2023 Chevrolet Blazer vehicles. General Motors, LLC (GM) is recalling certain 2023 Cadillac XT6, GMC Acadia, Chevrolet Blazer, Traverse, and 2022-2023 Cadillac XT5 vehicles. The transmission may have been built with an incorrect sun gear, which can result in the driver-side half-shaft disengaging from the transmission. A half-shaft disengaging from the transmission can result in a loss of drive power or vehicle rollaway when the vehicle is placed in park.
Words owners may use
Does this match the moment?
Symptoms in the pattern
- The vehicle may hesitate, shift unexpectedly or lose drive, depending on the recalled part
- An open campaign appears when the complete VIN is checked
- Some recalled vehicles may show no advance warning before the component fails
Vehicles and scope
- 2023 Chevrolet Blazer
- NHTSA campaign 23V172000
- The manufacturer filing lists 8,744 potentially affected units across the complete campaign.
- VIN eligibility determines whether this recall applies to an individual vehicle
Manufacturer position
What the official procedure directs
Dealers will replace the sun gears, free of charge. Owner notification letters were mailed on July 27, 2023. The remedy is expected to become available August 31, 2023.
Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.
Original evidence
Open the documents behind this page.
Repair paths and safe checks
Separate the diagnosis from the action.
Use the official recall remedy
Dealers will replace the sun gears, free of charge. Owner notification letters were mailed on July 27, 2023. The remedy is expected to become available August 31, 2023.
Do not buy parts from the campaign description alone. VIN scope, superseded remedies and parts availability can change.
What owners reported
Did this repair fix the same symptom on your car?
Loading owner reports…
Check the complete VIN before arranging work
Enter the 17-character VIN in NHTSA's recall lookup and ask the manufacturer or an authorised dealer to confirm whether the campaign is open for this vehicle.
A year, make and model match does not prove that every vehicle is included. The VIN result controls eligibility.
What owners reported
Did this repair fix the same symptom on your car?
Loading owner reports…
Useful before authorizing work
Read the method beside the problem
These guides explain the safety and evidence checks that apply to this problem file.
Check recalls by VIN
A VIN search checks the displayed NHTSA records for an unrepaired safety recall associated with one vehicle. A model search shows only the wider campaign population.
Read guide ↗When a car is unsafe
A warning light does not always mean the same thing, but weak brakes or smoke leave little room for experimentation. Damaged tires and certain recall instructions can do the same.
Read guide ↗Car shudders or vibrates
A useful diagnosis starts with when the vibration happens and where you feel it. The word shudder alone does not identify a transmission fault.
Read guide ↗More for this model
Other reviewed Chevrolet Blazer conditions
2025 Chevrolet Blazer · Body & structure
Door may open or fail to latch
The door strikers were not properly heat-treated, which can cause them to break.
2019 to 2020 Chevrolet Blazer · Transmission & drivetrain
Powertrain defect may interrupt drive
The start/stop accumulator endcap may have missing bolts.
2021 Chevrolet Blazer · Safety restraints
Seat belt may not restrain an occupant
Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle.