Is the 2020 Chevrolet Blazer a bad year?
222 owner complaints to NHTSA. Transmission complaints: 75, 6.3× a quiet Blazer year.
Keep it, but watch the transmission
Half of the transmission complaints for this year were filed at 26k–78k miles, where you are now.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2020 Blazer owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 50,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Transmission and drivetrainSTANDS OUT | 75 (34%) | 26k–78k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| Electrical systemSTANDS OUT | 77 (35%) | too few with a mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| EngineSTANDS OUT | 73 (33%) | too few with a mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| SteeringSTANDS OUT | 41 (18%) | too few with a mileage | Steering rack and pinion replacement $700–$2,100 |
| Brakes | 11 (5%) | too few with a mileage | — |
| Fuel system | 5 (2%) | too few with a mileage | — |
| Lane assist | 5 (2%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 50,000 miles. Not a quote.
What owners reported alongside their complaints
Of 222 complaints: 5 mention a crash · 1 mentions a fire · 6 report an injury · 6 say the car was towed.
65 complaints were filed in the last 12 months, the newest in Oct 2026.
Counts of what owners wrote in their complaints, not verified by anyone.
Recalls for the 2020 Chevrolet Blazer: 3
The affected tires were cured for too long during production. Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.
The start/stop accumulator endcap may have missing bolts. Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress to a loss of propulsion, increasing the risk of a crash.
General Motors, LLC. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment. If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Chevrolet: 322
Repair instructions Chevrolet sent its dealers for symptoms seen in the shop on the 2020 Chevrolet Blazer. Ask a dealer or mechanic for a bulletin by its number.
Potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set
Normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal…
Diagnostic repair information to correct an oil leak in the engine
Test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative
Neighbouring years
2019 Blazer: 190 complaints, keep it, but watch the transmission · 2021 Blazer: 142 complaints, keep it, but watch the engine.
Every Chevrolet Blazer year
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Questions
Is the 2020 Chevrolet Blazer a bad year?
222 owner complaints to NHTSA. Transmission complaints: 75, 6.3× a quiet Blazer year. At 50,000 miles the tool says: Keep it, but watch the transmission. Half of the transmission complaints for this year were filed at 26k–78k miles, where you are now.
What are the most common problems with the 2020 Chevrolet Blazer?
By owner complaints to NHTSA: transmission and drivetrain (75), electrical system (77), engine (73), steering (41), brakes (11). Half of the transmission complaints were filed between 26k–78k miles.
How many recalls does the 2020 Chevrolet Blazer have?
3 recall campaigns list this model year: Tires (NHTSA 21V-115), Transmission and drivetrain (NHTSA 20V-668), Air bags (NHTSA 20V-446). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.