2020 Chevrolet Blazer transmission and drivetrain problems
73 of the 219 complaints owners filed with NHTSA about the 2020 Chevrolet Blazer name the transmission and drivetrain (NHTSA’s “Power Train” heading — the transmission, transfer case, driveshafts, axles and differentials — NHTSA files them under one heading). Filed under the same heading: 103 manufacturer bulletins, 1 recall. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the transmission and drivetrain
Source: NHTSA complaint database0 of the 73 reports a crash · 0 a fire · 2 injuries. Self-reported, unverified.
Filed per year: 2020: 1 · 2022: 5 · 2023: 6 · 2024: 17 · 2025: 33 · 2026: 11
Half of the 16 owners who gave an odometer reading reported the transmission and drivetrain problem between 38,000 and 70,000 miles. A median of reports, not the life of a part.
219 complaints in all about the 2020 Chevrolet Blazer, 11 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Power Train” means the same area of the vehicle, not one fault.
Across model years: Chevrolet Blazer transmission and drivetrain problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the transmission and drivetrain. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
Intermittent Shift to Park Message Displayed While Vehicle in Park. I am seeing an intermittent Shift to Park message when the vehicle has been shifted into Park, and the ignition has been turned to the Off position. My car model is a push-to-start/stop ignition type and this issue prevents me from turning off the car at times.
As I was driving, my engine coolant temperature gauge went from normal level down all the way pegged to C. Message appears on my dashboard "Steering Assist is Reduced. Drive with Care". Also, radiator fan continuously runs as if the air conditioner was turned on, which it was not.
The contact owns a 2020 Chevrolet Blazer. The contact stated that while the vehicle was shifted into reverse, the vehicle failed to respond as intended. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 65,000
Unknown car will not shift into park without me having to re-shift to park and then the vehicle will shut off after re-shifting
I'm getting a "Shift to Park" error message. Lights and dinging sound will not turn off during this. I have to restart the car and shift the car from Park, neutral, drive and reverse. It takes sometimes numerous tries to get it to show in park. The problem is getting worse as time goes on. More frequent and harder to get to go into Park
What is on file about the transmission and drivetrain
Source: NHTSA recalls, investigations and manufacturer communicationsRecall filed under this heading
- 20V668000 HighOct 29, 2020 · 194,105 vehicles
- General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC Acadia, and 2020 Cadillac XT6 vehicles. The start/stop accumulator endcap may have missing bolts.
103 manufacturer bulletins filed under this heading
The 0 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
P0128 P0747 B3055 B3060 B3935 P0208 P0024 P0746
Codes a bulletin or an owner’s complaint about the 2020 Chevrolet Blazer names on this model year; a code with a record of its own links it.
Other systems with a record on the 2020 Chevrolet Blazer
Source: the same files- electrical problems 76 complaints
- engine problems 71 complaints
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre transmission and drivetrain problems common on the 2020 Chevrolet Blazer?
They are documented: NHTSA holds 73 owner complaints naming the transmission and drivetrain on this model year (33% of everything owners filed about it), and 103 manufacturer bulletins, 1 recall are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the transmission and drivetrain on the 2020 Chevrolet Blazer?
Yes — one campaign is filed under this heading: 20V668000. A recall is matched by VIN; check yours at nhtsa.gov/recalls.
When do transmission and drivetrain problems show up on the 2020 Chevrolet Blazer?
Owners who gave an odometer reading reported it at a median of 50,000 miles; half of them between 38,000 and 70,000. That is when reports cluster, not the life of a part.
What does NHTSA's "Power Train" heading cover?
The transmission, transfer case, driveshafts, axles and differentials — NHTSA files them under one heading. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.