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2021 Chevrolet Blazer

Gas

Small Sport Utility Vehicle 2WD
5 EPA-rated configurations
Data refreshed 2026-10-26

Safety Signal

92 / 100 from the NHTSA recall record

RecallsNHTSA campaigns 1

Complaints6 crash · 1 fire · 7 injured reported 140

Crash ratingNHTSA overall 5★

Fuel economybest combined, EPA 25 mpg

2027 2026 2025 2024 2023 2022 2021 2020 2019

The 2021 Chevrolet Blazer is sold in the U.S. as a gas compact SUV with 5 EPA-rated configurations. The most efficient version, the Blazer FWD, is EPA-rated at 25 mpg combined. NHTSA lists 1 recall campaign for this model year, which gives it a Safety Signal grade of A. Owners have filed 140 complaints, most often about the engine. NHTSA crash-tested it at 5 stars overall.

Chevrolet Blazer (2018) — photograph via Wikimedia Commons — Chevrolet Blazer (2018) · Photo: Kevauto · CC BY-SA 4.0 · Wikimedia Commons

Specs & fuel economy

Source: EPA fueleconomy.gov

Configuration	Powertrain	Drive	Engine / motor	City	Hwy	Comb	Annual fuel*
Blazer FWD	Gas	FWD	2.0L 4-cyl turbo	22	29	25	$2,700
Blazer AWD	Gas	AWD	2.0L 4-cyl turbo	22	27	24	$2,800
Blazer FWD	Gas	FWD	2.5L 4-cyl	21	27	23	$2,900
Blazer FWD	Gas	FWD	3.6L 6-cyl	20	27	22	$3,050
Blazer AWD	Gas	AWD	3.6L 6-cyl	19	26	21	$3,200

*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 42898, 42905, 42897, 42957, 42964.

Emissions & certification

Source: EPA emission certificates

Configuration	Smog rating	Emission standard	Where it can be sold new	SmartWay
Blazer AWD, Blazer FWD	7 / 10	California LEV-III SULEV30 / Federal Tier 3 Bin 30	All 50 states (federal, all altitudes); California and states following California standards	—
Blazer FWD	5 / 10	California LEV-III ULEV70 / Federal Tier 3 Bin 70	All 50 states (federal, all altitudes); California and states following California standards	—
Blazer AWD, Blazer FWD	6 / 10	California LEV-III ULEV50 / Federal Tier 3 Bin 50	All 50 states (federal, all altitudes); California and states following California standards	—

Certified for all fifty states, so it can be registered new anywhere in the U.S.

The smog rating scores tailpipe pollutants other than greenhouse gases, 1 (worst) to 10 (best), and is comparable only within a model year. The standard is the federal bin or California tier the configuration was certified to. Both come from the EPA certificate behind the window sticker.

Specifications filed with NHTSA

Source: NHTSA vPIC

Dimensions Exterior

Body style	Sport Utility Vehicle [SUV]/Multipurpose Vehicle [MPV]
Doors	4
GVWR class	Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)

Engine Basics

Cylinders	4
Displacement	2.5 L
Engine configuration	In-Line

Fuel Economy

Fuel	Gasoline

Seating

Seat rows	2
Seating capacity	5 seats

Transmission

Drivetrain	FWD/Front-Wheel Drive
Transmission	Automatic
Transmission speeds	9

Driver assistance

Standard: Anti-lock brakes, Backup camera, Blind-spot monitoring, Electronic stability control, Forward collision warning, Lane departure warning, Lane keeping assist, Parking assist, Pedestrian automatic emergency braking, Rear cross-traffic alert

Optional: Adaptive cruise control

Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: 1LT, 2LT, 3LT, Premier). Figures for the trim you are looking at may differ.

Dimensions & weight

Source: Transport Canada

Length	191.3 in
Width (body, without mirrors)	76.8 in
Height	66.9 in
Wheelbase	112.6 in
Track, front	66.5 in
Track, rear	66.1 in
Curb weight	3,781–4,211 lb
Weight distribution, front/rear	59/41

Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 3 configurations: 2.0L FWD 4-door SUV, 3.6L AWD 4-door SUV, 3.6L FWD 4-door SUV. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.

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Recalls (1)

Source: NHTSA recall database

▲high

Seat Belts

N202322230

470 vehicles 94% reported repaired

Problem 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. Risk If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury. Fix 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.

Filed with NHTSAOwner letter PDF

NHTSA campaign 20V811000 reported Dec 23, 2020 General Motors, LLC the full filing, and every vehicle covered →

These are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.

Whether any of this applies to one specific Blazer

A campaign covers a build range, not a model year, so two identical-looking cars from 2021 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Chevrolet publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.

NHTSA VIN check →Chevrolet’s own VIN lookup →

Hear about a recall before the letter does

The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2021 Chevrolet Blazer, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.

Owner complaints

Source: NHTSA complaint database

140complaints filed

6 involved a crash · 1 a fire · 7 injuries · 0 deaths reported

17 per 10,000 built · Chevrolet reported 81,425 Blazer built (its Early Warning production report to NHTSA)

Filed per year: 2021: 11 · 2022: 4 · 2023: 12 · 2024: 14 · 2025: 60 · 2026: 39

Most-cited components

Engine 46

Electrical System 41

Unspecified 22

Service Brakes 20

Power Train 19

Fuel/Propulsion System 18

In owners' own words

Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.

The contact owns a 2021 Chevrolet Blazer. The contact stated that the check engine warning light was illuminated. The contact was unable to use the electrical features in the vehicle. The vehicle was taken to the local dealer, where it was diagnosed that the purge pump needed to be replaced. The vehicle was not repaired.

Engine at 36,000 miles Nov 28, 2023 NHTSA owner report · ODI 11557219

Receiving 3 different errors on dash display. 1) Action Required- No Remote Detected 2) Action Required- No Remote Detected Press Brake to Restart 3) No Remote Key Wa Detected Place Key In Transmitter Pocket Then Start Your Vehicle. All of these errors are intermittent and have appeared with using 2 different Remotes.

Electrical System Sep 21, 2023 NHTSA owner report · ODI 11545926

The breaks make a squealing noise all the time which is concerning. I was told by Beaver Chevrolet that this is normal as the breaks were changed in newer car models. They have made a squealing noise ever since I bought the car brand new.

Service Brakes Sep 12, 2023 NHTSA owner report · ODI 11544054

The contact owned a 2021 Chevrolet Blazer. The contact stated while driving 69-70 MPH, the steering wheel strongly pulled to the left side and into the roadway median. There was no warning light illuminated. The contact stated that the vehicle hit the median and bounced, facing incoming traffic.

Steering at 24,000 miles Aug 17, 2023 NHTSA owner report · ODI 11539220

The Esc display came up then sutbality sensor show and my back wheel went right. My car flipped twice and then landed on the guardrail

Suspension Aug 17, 2023 NHTSA owner report · ODI 11539221

Tires - purchased vehicle from car dealership two weeks ago. Drivers side rear tire low. Aired up was low again next day. Blow out On freeway tires are unsafe. Per Discount Tire said tire could not be repaired . all four tired unsafe, tread issue. Replaced two rear tires. Unknown when light came on. Tire size 265/45r21 dot A3LMWD 30

Tires Jul 20, 2023 NHTSA owner report · ODI 11533392

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Reported by Chevrolet itself: 22 death-or-injury claims on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 34 injured, as claimed, not verified — about 27 per 100,000 built. Every Blazer model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.

When owners reported it

Reported at 36k

miles, typically

Half the 25 owner reports with an odometer reading on file fall between 21,000 and 68,000 miles. That is when problems get reported, which is not the same as when they start — and not a failure rate, because nobody knows how many of these cars never had a problem at all.

Too few readings for a curve — the 25 on file: 4 under 10k, 1 10k–20k, 4 20k–30k, 5 30k–40k, 1 40k–50k, 2 50k–60k, 2 60k–70k, 2 80k–90k, 2 90k–100k, 2 100k–150k.

Odometer readings as filed by owners with NHTSA. Readings under 100 or over 400,000 miles are dropped as data entry rather than history, and a component needs at least 12 readings before a median is shown for it.

Crash ratings

Source: NHTSA NCAP

Configuration	Overall	Frontal	Side	Rollover	Rollover risk
SUV AWD	★★★★★	★★★★★	★★★★★	★★★★☆	15%
SUV FWD	★★★★★	★★★★★	★★★★★	★★★★☆	16%

NHTSA New Car Assessment Program.

Service bulletins & campaigns

Source: NHTSA manufacturer communications

Extended coverage on file 3 filings by the manufacturer with NHTSA naming this model year

15 years or 150,000 miles, whichever comes first · GM service campaign N252508350Certain vehicles listed above, may have a condition that could cause the engine coolant thermostat to open at a lower temperature than intended.
Term not in NHTSA’s summary · GM warranty extension 22-NA-244This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
15 years or 150,000 miles, whichever comes first · GM warranty extension N242441120Certain vehicles, equipped with a 2.0 gasoline engine (RPO LSY), may have a condition that could cause the evaporative emissions purge pump to fail.

The term and the vehicles it covers are the manufacturer’s, as NHTSA’s summary of each filing states them; a dealer checks one particular car by its VIN. Every GM warranty extension (33) → · Every warranty extension on file, all makes →

Communicationsfiled with NHTSA 813

Most recentmanufacturer date 2026-09-26

Kindsas classified by NHTSA 795 service bulletins, 8 emissionss, 4 service campaigns

Most often about: Equipment, Engine, Electrical System, Unknown Or Other, Power Train.

PIT5698F Service bulletin
2026-09-26 · Unknown Or Other
This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
PIP4902W Service bulletin
2026-09-04 · Unknown Or Other
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIC6551C Service bulletin
2026-08-20 · Unknown Or Other
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIT5099J Service bulletin
2026-07-21 · Unknown Or Other
PI to help diagnose A/C concern
PIT5966F Service bulletin
2026-06-23 · Unknown Or Other
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIC6423A Service bulletin
2026-05-11 · Unknown Or Other
Pi created to provide GM dealers with information on gathering information for projection issue
PIC6551B Service bulletin
2026-05-11 · Unknown Or Other
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIT3271Q Service bulletin
2026-04-01 · Unknown Or Other
This preliminary information communicates information about how to determine if a wheel and tires size change is available.

A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.

Diagnostic trouble codes on file

Source: NHTSA manufacturer communications and complaints

Codes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.

Code	What it means	Most often filed under	Where it appears
P023F P023F on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Electrical System · Battery →	7 bulletins · 3 owner reports
P04FB P04FB on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Unknown Or Other	10 bulletins
P0300 P0300 on Chevrolet →	Misfire detected, but not isolated to one cylinder.	Engine · Ignition coils →	8 bulletins
P129F P129F on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Electrical System · Battery →	7 bulletins
P0128 P0128 on Chevrolet →	The engine is not reaching its normal operating temperature in the expected time — usually the thermostat.	Engine · Thermostat →	2 bulletins · 4 owner reports
C056D C056D on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Parking Brake · Parking brake cable →	5 bulletins
B3055 B3055 on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Air Bags	4 bulletins
B3060 B3060 on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Air Bags	4 bulletins
B3935 B3935 on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Air Bags	4 bulletins
P0308 P0308 on Chevrolet →	Cylinder 8 is misfiring.	Engine · Ignition coils →	4 bulletins
P050D P050D on Chevrolet →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	4 bulletins
U0155 U0155 on Chevrolet →	A module has stopped hearing from the instrument cluster.	Electrical System · Battery →	4 bulletins

Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.

At the New York inspection station

Source: New York State DMV

New York inspections 3.6%

failed emissions

2,407 initial inspections of 2,374 vehicles.

Measure	The 2021 Blazer	Every 2021 vehicle	Behind it
Failed the emissions check	3.6%	1.9%	2,404
Failed the safety inspection	1.3%	1.5%	2,407
Air-bag warning lamp stayed lit	0.17%	0.19%	2,407
Miles driven a year	10,715	10,343	odometer at inspection
Average odometer	56,588	54,681	odometer at inspection

New York’s emissions test on these model years is an on-board diagnostics check: it fails a car whose check-engine light is on or whose self-tests have not finished. First inspections only, so a car that failed and came back is counted once; private and special plates, not taxis, livery or commercial plates. A rate appears only where at least 200 inspections stand behind it. “Every 2021 vehicle” is every 2021 model-year car, SUV and pickup inspected in the same window, all makes. This is the state’s record of test results, not a reliability score by itself. Source: New York State Department of Motor Vehicles, Vehicle Inspections (data.ny.gov, Open NY terms).

Blazer by model year

all years, side by side →

Year Safety Recalls Complaints

2027 A 0 0 312 mi 2026 A 1 1 312 mi 2025 C 3 55 334 mi 2024 C 5 130 324 mi 2023 B 2 44 25 mpg 2022 A 1 54 25 mpg 2021 this page A 1 140 25 mpg 2020 C 3 224 24 mpg 2019 B 2 189 24 mpg

Common questions about the 2021 Blazer

Source: EPA, NHTSA and manufacturer press kits

Does the 2021 Chevrolet Blazer have any recalls?

NHTSA has posted 1 recall campaign for the 2021 Chevrolet Blazer. The most serious on file is 20V811000, covering Seat Belts. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.

How safe is the 2021 Chevrolet Blazer?

NHTSA gave the 2021 Chevrolet Blazer 5 stars overall in its New Car Assessment Program tests — 5-star frontal crash, 5-star side crash, 4-star rollover. WhichTrim also grades it A (92/100) on its recall record, which is a different question from crash protection.

What is the fuel economy of the 2021 Chevrolet Blazer?

Across the 5 EPA-rated configurations of the 2021 Chevrolet Blazer, the best EPA combined figure is 25 mpg. Figures are the EPA's own, per configuration, and every one is listed above.

What are the dimensions of the 2021 Chevrolet Blazer?

Transport Canada measured it at 191.3 in long, 76.8 in wide (body, without mirrors), 66.9 in tall, on a 112.6 in wheelbase. Curb weight: 3,781–4,211 lb depending on configuration. Those are its measurements of the North American versions; every figure is in the table above.

What do owners complain about on the 2021 Chevrolet Blazer?

Owners have filed 140 complaints with NHTSA about the 2021 Chevrolet Blazer, most often about engine, electrical system, unspecified. Of those, 6 involved a crash, 1 a fire, 7 reported injuries. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.

How clean is the 2021 Chevrolet Blazer?

The EPA smog rating for the 2021 Chevrolet Blazer runs 5 to 7 out of 10 across its configurations. That score covers tailpipe pollutants other than greenhouse gases, and it only compares vehicles within the same model year. It is certified for all fifty states, so it can be registered new anywhere in the U.S. Its configurations were certified to different standards — California LEV-III SULEV30, California LEV-III ULEV50, California LEV-III ULEV70, Federal Tier 3 Bin 30, Federal Tier 3 Bin 50, Federal Tier 3 Bin 70 — which the table above lists per configuration.

Are there service bulletins for the 2021 Chevrolet Blazer?

The manufacturer has filed 813 service bulletins and related communications with NHTSA for the 2021 Chevrolet Blazer, most often covering equipment, engine, electrical system. The most recent is dated 2026-09-26. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.

How does the 2021 Chevrolet Blazer do at state inspection?

In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2021 Chevrolet Blazer failed the emissions check on 3.6% of first inspections — higher than the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 1.3% (every 2021 vehicle: 1.5%). The figures are New York State DMV’s own inspection records, first inspections only, and the table above sets each one against every vehicle of the same model year.

What we hold, and what an empty row means

Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.

Data	Held	Source	What it covers — or what empty means
Fuel economy & configurations	5 configurations	EPA certification records	Every configuration the EPA certified for sale, with its own test figures.
Emission certificates	5 configurations	EPA emission certificates	Smog rating, standard and the sales area that decides where the car can be sold new.
Recalls	1	NHTSA recall campaigns	A complete federal register: every campaign covering this model year, with severity and advisory flags.
Owner complaints	140	NHTSA complaint database	Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold.
Crash ratings	2 tested	NHTSA NCAP	Only the configurations NHTSA chose to crash-test, which is never all of them.
Service bulletins	813	NHTSA manufacturer communications	Everything the manufacturer told its dealers about a defect or malfunction, short of a recall.
Investigations	none	NHTSA Office of Defects Investigation	No defect investigation has been opened.
Driver-assist crash reports	none	NHTSA Standing General Order 2021-01	No report has been filed. Only entities named in the order report, and only crashes they hear of — so this is also what an unequipped car, or a manufacturer without telematics, looks like.
Specifications filed with NHTSA	12 fields	NHTSA vPIC, decoded from VIN patterns	What the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder.
Measured dimensions	7 fields	Transport Canada, Canadian Vehicle Specifications	Length, width, height, wheelbase, track and curb weight, measured on the North American versions.
Trims, pricing & equipment	none	Manufacturer press kit	We have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind.

Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.

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