Reliable Auto DB

2021 Chevrolet Blazer reliability

Is it reliable?

NHTSA's file on the 2021 Chevrolet Blazer holds 133 complaints after 6 years, a rate of 9 per year. That is more complaints per year than most Blazer years here — over the median of the other years, which is 6. NHTSA has 1 recall on file, including Seat belts.

2019 Chevrolet Blazer
Photo by Kevauto, resized from the original. Wikimedia Commons CC BY-SA 4.0
Complaints

133

Per year

9

Recalls

1

Years on the road

6

What owners report

The complaints owners file most often name Engine (41 of 133), then Electrical system (38) and Service brakes (19). The most filings arrived in 2025 (60 of 133). Those filings include 6 that report a crash, 1 that reports a fire, and 5 that report an injury.

Next to 2020 and 2022

The 2020 Blazer has 219 complaints, 6 per year, and the 2022 has 50 complaints, 5 per year. The 2021 has more complaints per year than the 2020. The 2021 has more complaints per year than the 2022.

The complaint rate is complaints filed in this year’s first 3 years on the road, divided by however many of those years have passed. Recalls are a separate count. The numbers are for the US-market 2021 Chevrolet Blazer. How we count. Data as of .

Recalls (1)

Recall Seat belts 2020-12-23 · NHTSA campaign 20V811000
Summary General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.
Remedy GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.

Complaints by component (133 total)

Engine
41
Electrical system
38
Service brakes
19
Powertrain
18
Fuel and propulsion system
17
Steering
15
Forward collision avoidance
7
Tires
5
Suspension
4
Engine and engine cooling
3
Lane departure
3
Air bags
2
Structure
2
Wheels
2
Back-over prevention
1
Equipment
1
Exterior lighting
1
Fuel system, gasoline
1
Parking brake
1
Seats
1
Speed control
1
Traction control
1
Show 14 more Show less
Crash-flagged

6

Fire-flagged

1

Injury reports

5

Death reports

0

Complaints filed per year

11202142022122023142024602025322026
Excerpts from recent NHTSA complaint filings
  • "Vehicle Information: 2021 Chevrolet Blazer 2.5L engine, VIN [XXX]. Odometer 118000 miles.Description of Incident: While operating the vehicle, the mechanical brake vacuum pump experienced a catastrophic internal…"
    Service brakes, Engine · filed 2026-09-17
  • "My 2021 Chevrolet Blazer has experienced repeated problems involving the cooling system and is now exhibiting recurring symptoms that concern me about the vehicle’s reliability and safety. In 2023, the vehicle required…"
    Wheels, Engine · filed 2026-09-16
  • "The contact owns a 2021 Chevrolet Blazer. The contact stated that a technician identified a radiator leak during an emissions test after smelling an abnormal coolant odor. The technician confirmed that the coolant had…"
    Engine and engine cooling · filed 2026-09-09
  • "The contact owns a 2021 Chevrolet Blazer. The contact stated that while driving 40 MPH, the vehicle stalled and was unable to be restarted. The vehicle was towed to the residence. The husband was a mechanic and…"
    Electrical system · filed 2026-09-02
  • "My 2021 Chevrolet Blazer RS equipped with the 3.6L LGX V6 experienced catastrophic engine failure at approximately 90,200 miles. The vehicle had no prior warning. The dealer diagnosed the timing chain / lift/ cam…"
    Engine · filed 2026-08-24

NHTSA crash ratings

Version Overall Front Side Rollover
2021 Chevrolet Blazer SUV AWD 5 stars 5 stars 5 stars 4 stars
2021 Chevrolet Blazer SUV FWD 5 stars 5 stars 5 stars 4 stars

Stars are how this vehicle did in NHTSA crash tests. They are a safety result, separate from the complaint record. Not rated means that test was not run for this version.

Fuel economy

Trim Engine Transmission Drive City Hwy Combined Annual fuel cost
Blazer all-wheel drive 2L, 4-cyl Automatic 9-speed All-wheel drive 22 27 24 MPG $2700
Blazer all-wheel drive 3.6L, 6-cyl Automatic 9-speed All-wheel drive 19 26 21 MPG $3100
Blazer front-wheel drive 2.5L, 4-cyl Automatic (9-speed) Front-wheel drive 21 27 23 MPG $2800
Blazer front-wheel drive 2L, 4-cyl Automatic 9-speed Front-wheel drive 22 29 25 MPG $2600
Blazer front-wheel drive 3.6L, 6-cyl Automatic 9-speed Front-wheel drive 20 27 22 MPG $2950

Specs and fitment

Crossover (current nameplate), 2019–present
Body styles SUV
Oil 0W-20 (2.0L turbo and 3.6L V6) , 6 qt capacity
Tire size 235/60R19 to 265/45R21 (trim-dependent)

Known issues for this generation

Recall 20V-668 covers certain 2019-2020 Chevrolet Blazer vehicles among other GM crossovers: the start/stop transmission accumulator end cap may have missing bolts, which can lead to a transmission fluid leak and possible loss of propulsion. Recall 23V-042 covers certain 2023 Blazer and Traverse vehicles: left-side half-shaft assemblies may be missing a retaining ring, which can allow the half shaft to disengage. Recall 23V-869 covers certain 2024 Blazer vehicles: door strikers may fracture and allow a door to open unexpectedly.

Compare

Previous year 2020 Chevrolet Blazer Next year 2022 Chevrolet Blazer See every Chevrolet Blazer model year →

Frequently asked questions

Is the 2021 Chevrolet Blazer reliable?

NHTSA's file on the 2021 Chevrolet Blazer holds 133 complaints after 6 years, a rate of 9 per year. That is more complaints per year than most Blazer years here — over the median of the other years, which is 6. NHTSA has 1 recall on file, including Seat belts.

What are common problems with a 2021 Chevrolet Blazer?

The complaints owners file most often name Engine (41 of 133), then Electrical system (38) and Service brakes (19). The most filings arrived in 2025 (60 of 133). Those filings include 6 that report a crash, 1 that reports a fire, and 5 that report an injury.

Is the 2021 Chevrolet Blazer more reliable than the years next to it?

The 2020 Blazer has 219 complaints, 6 per year, and the 2022 has 50 complaints, 5 per year. The 2021 has more complaints per year than the 2020. The 2021 has more complaints per year than the 2022.

Has the 2021 Chevrolet Blazer been recalled?

The 2021 Chevrolet Blazer has 1 recall on file with NHTSA. See the recalls table on this page for dates, components, and remedies.

How many complaints have owners filed about the 2021 Chevrolet Blazer?

Owners have filed 133 complaints about the 2021 Chevrolet Blazer with NHTSA.

What mpg does a 2021 Chevrolet Blazer get?

EPA-rated combined fuel economy for the 2021 Chevrolet Blazer is 23 MPG. See the fuel economy table on this page for city and highway figures by engine and transmission.

Is the modern Chevrolet Blazer a body-on-frame SUV?

No. The 2019+ Blazer is a unibody crossover distinct from the historical K5 Blazer.

What oil does a 2019+ Chevrolet Blazer take?

0W-20 for both the 2.0L turbo and 3.6L V6 common US powertrains. Confirm the filler-cap grade.

What does recall 20V-668 cover on early Blazers?

Certain 2019-2020 Blazer vehicles among other GM crossovers: the start/stop transmission accumulator end cap may have missing bolts, which can lead to a transmission fluid leak and possible loss of propulsion.