2021 Chevrolet Trailblazer
The 2021 Chevrolet Trailblazer is sold in the U.S. as a gas compact SUV with 3 EPA-rated configurations. The most efficient version, the Trailblazer FWD, is EPA-rated at 31 mpg combined. NHTSA lists 4 recall campaigns for this model year, which gives it a Safety Signal grade of C. Owners have filed 196 complaints, most often about the electrical system. NHTSA crash-tested it at 5 stars overall.

Specs & fuel economy
Source: EPA fueleconomy.gov| Configuration | Powertrain | Drive | Engine / motor | City | Hwy | Comb | Annual fuel* |
|---|---|---|---|---|---|---|---|
| Trailblazer FWD | Gas | FWD | 1.3L 3-cyl turbo | 29 | 33 | 31 | $2,150 |
| Trailblazer FWD | Gas | FWD | 1.2L 3-cyl turbo | 28 | 31 | 29 | $2,300 |
| Trailblazer AWD | Gas | AWD | 1.3L 3-cyl turbo | 26 | 30 | 28 | $2,400 |
*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 42522, 42523, 42509.
Emissions & certification
Source: EPA emission certificates| Configuration | Smog rating | Emission standard | Where it can be sold new | SmartWay |
|---|---|---|---|---|
| Trailblazer FWD | 7 / 10 | California LEV-III SULEV30 / Federal Tier 3 Bin 30 | All 50 states (federal, all altitudes); California and states following California standards | SmartWay |
| Trailblazer AWD, Trailblazer FWD | 7 / 10 | California LEV-III SULEV30 / Federal Tier 3 Bin 30 | 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 vPICDimensions Exterior
| Body style | Sport Utility Vehicle [SUV]/Multipurpose Vehicle [MPV] |
| Doors | 4 |
| GVWR class | Class 1C: 4,001 - 5,000 lb (1,814 - 2,268 kg) |
Engine Basics
| Cylinders | 3 |
| Displacement | 1.2 L |
| Engine configuration | In-Line |
Fuel Economy
| Fuel | Gasoline |
Seating
| Seat rows | 2 |
| Seating capacity | 5 seats |
Transmission
| Drivetrain | FWD/Front-Wheel Drive |
| Transmission | Continuously Variable Transmission (CVT) |
| Transmission speeds | 9 |
Driver assistance
Standard: Anti-lock brakes, Automatic emergency braking, Backup camera, Electronic stability control, Forward collision warning, Lane departure warning, Lane keeping assist, Pedestrian automatic emergency braking
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: ACTIV, LS, LT, RS). Figures for the trim you are looking at may differ.
Dimensions & weight
Source: Transport Canada| Length | 173.6 in |
| Width (body, without mirrors) | 71.3 in |
| Height | 65.7 in |
| Wheelbase | 103.9 in |
| Track, front | 61.0 in |
| Track, rear | 61.8 in |
| Curb weight | 3,014–3,225 lb |
| Weight distribution, front/rear | 60/40 |
Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 3 configurations: 4-door SUV 1.2L FWD, 4-door SUV 1.3L FWD, 4-door SUV AWD. 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.
Factory warranty running out?
The 2021 Chevrolet Trailblazer is in the years where transmission, electronics and drivetrain repairs land on the owner. What an extended plan does and does not cover is worth reading before a dealer quotes you one.
What to check before you buy →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Recalls (4)
Source: NHTSA recall databaseService Brakes
A202307260Seats
A202304380Tires
A202304070These 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 Trailblazer
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.
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 Trailblazer, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.
Parts & accessories for the 2021 Chevrolet Trailblazer
Search by fitment on eBay Motors — OEM take-offs, aftermarket, and the trim pieces dealers no longer stock. The listing and the price are the seller's.
Find parts for this Trailblazer →Owner complaints
Source: NHTSA complaint database7 involved a crash · 3 a fire · 5 injuries · 0 deaths reported
22 per 10,000 built · Chevrolet reported 90,386 Trailblazer built (its Early Warning production report to NHTSA)
Filed per year: 2020: 6 · 2021: 20 · 2022: 17 · 2023: 15 · 2024: 46 · 2025: 48 · 2026: 44
Most-cited components
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 ABS and stability control systems crash without warning. Randomly on a trip the check engine light randomly comes on without warning and immediately my break system stops being effective. I have to put full force on the brake pedal to start breaking the vehicle and coming to a stop becomes difficult.
Purchased my 2021 Chevy Trailblazer in August 2021 with less than 100 miles. After about 500 miles the Lane assist, forward collision assistant and the automatic breaking features all stopped working. Factory reset has been set several times with no fix. The buttons on the steering wheel do not do anything when pressed.
I have had multiple issues with the car since I've purchased it. The brakes continuously make noise, and the automatic Emergency Braking DOES not work. The tire pressure sensors don't work, they have the wrong tire pressure for each tire, and the tires constantly over inflate. Also, my front bumper is coming off.
225/60R17 99H Bought trailblazer brand new from dealer March 2021. I've owned many cars, street cars, etc. I've never had a tire with 10K miles develop a bulge in the side. I took back to dealer as warranty book showed covered to 12K, but they said 'upon inspecting, it appears from a pothole'.
The contact owns a 2021 Chevrolet Trailblazer. The contact received notification of NHTSA Campaign Number: 21V440000 (Equipment). The contact called a local dealer and was informed that the only resolution for the recall would be to remove the jack stand inside the vehicle.
The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at various speeds, the vehicle made an abnormal popping sound before the power steering and brakes failed. Additionally, the brake pedal became extremely sensitive while gently being depressed causing the vehicle to abruptly stop.
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: 39 death-or-injury claims on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 4 killed, 50 injured, as claimed, not verified — about 43 per 100,000 built. Every Trailblazer model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.
When owners reported it
miles, typically
Half the 30 owner reports with an odometer reading on file fall between 4,000 and 42,000 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.
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 | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★☆ | 18% |
| SUV FWD | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★☆ | 18% |
| SUV AWD | ★★★★☆ | ★★★★☆ | ★★★★★ | ★★★★☆ | 18% |
| SUV FWD | ★★★★☆ | ★★★★☆ | ★★★★★ | ★★★★☆ | 18% |
NHTSA New Car Assessment Program. Standard driver-assist: forward collision warning, lane departure warning, automatic emergency braking.
Service bulletins & campaigns
Source: NHTSA manufacturer communications- 15 years or 150,000 miles, whichever comes first · GM warranty extension N242450640-01Certain 2021 model year Buick Encore GX and Chevrolet Trailblazer vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger to fail.
- 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.
- Term not in NHTSA’s summary · GM warranty extension N242450640Certain vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger 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 →
Most often about: Engine, Equipment, Electrical System, Unknown Or Other, Power Train.
- PIT5698F Service bulletin2026-09-26 · Unknown Or Other
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- PIP4902W Service bulletin2026-09-04 · Unknown Or Other
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- PIT5995B Service bulletin2026-09-04 · Unknown Or Other
- This Preliminary Information provides the dealer information of the location of the rear seat child anchors.
- PIT6196A Service bulletin2026-08-28 · Unknown Or Other
- This Preliminary Information provides a diagnostic tip for diagnosing an issue with Cruise Control, Adaptive Cruise and Lane Keep Assist Turns Off or Inoperative.
- PIC6551C Service bulletin2026-08-20 · Unknown Or Other
- This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- PIC6589B Service bulletin2026-07-31 · Unknown Or Other
- This Preliminary information communicates to the techicians a diagnostic tip if a customer has a complaint of a whistle/wind noise at highway speeds.
- PIC6548B Service bulletin2026-07-23 · Unknown Or Other
- This Preliminary information communicates to the technician the direction needed when encountering an issue with switching between adaptive cruise control and regular cruise control or an issue with automatic high beam feature after the front camera was replaced.
- PIT5099J Service bulletin2026-07-21 · Unknown Or Other
- PI to help diagnose A/C concern
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 complaintsCodes 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 |
|---|---|---|---|
| P219A P219A on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Unknown Or Other | 9 bulletins |
| P2714 P2714 on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 3 bulletins · 5 owner reports |
| C0051 | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 7 bulletins |
| P0299 P0299 on Chevrolet → | The turbocharger or supercharger is not making the boost the computer asked for. | Engine | 6 bulletins · 1 owner report |
| P0521 P0521 on Chevrolet → | The oil pressure sensor reading does not track what the engine is doing. | Engine | 6 bulletins · 1 owner report |
| P0234 P0234 on Chevrolet → | The turbocharger or supercharger is making more boost than the computer asked for. | Engine | 6 bulletins |
| B000A B000A on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 5 bulletins |
| P0014 P0014 on Chevrolet → | The second camshaft on bank 1 is timed further advanced than commanded. | Engine | 4 bulletins · 1 owner report |
| P2797 P2797 on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 5 bulletins |
| B3055 B3055 on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 4 bulletins |
| B3060 B3060 on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 4 bulletins |
| B3935 B3935 on Chevrolet → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
At the New York inspection station
Source: New York State DMVIn New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2021 Chevrolet Trailblazer failed the emissions check on 3.9% of first inspections — higher than the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 1.9% (every 2021 vehicle: 1.5%).
failed emissions
4,408 initial inspections of 4,338 vehicles.
| Measure | The 2021 Trailblazer | Every 2021 vehicle | Behind it |
|---|---|---|---|
| Failed the emissions check | 3.9% | 1.9% | 4,395 |
| Failed the safety inspection | 1.9% | 1.5% | 4,408 |
| Air-bag warning lamp stayed lit | 0.14% | 0.19% | 4,408 |
| Miles driven a year | 10,780 | 10,343 | odometer at inspection |
| Average odometer | 57,204 | 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).
Trailblazer by model year
all years, side by side →Common questions about the 2021 Trailblazer
Source: EPA, NHTSA and manufacturer press kitsDoes the 2021 Chevrolet Trailblazer have any recalls?
NHTSA has posted 4 recall campaigns for the 2021 Chevrolet Trailblazer. The most serious on file is 21V440000, covering Equipment. 1 of them was filed with no repair available at the time — NHTSA's file records what the manufacturer had in hand on the filing date, not what exists today. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.
How safe is the 2021 Chevrolet Trailblazer?
NHTSA gave the 2021 Chevrolet Trailblazer 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 C (78/100) on its recall record, which is a different question from crash protection.
What is the fuel economy of the 2021 Chevrolet Trailblazer?
Across the 3 EPA-rated configurations of the 2021 Chevrolet Trailblazer, the best EPA combined figure is 31 mpg. Figures are the EPA's own, per configuration, and every one is listed above.
What are the dimensions of the 2021 Chevrolet Trailblazer?
Transport Canada measured it at 173.6 in long, 71.3 in wide (body, without mirrors), 65.7 in tall, on a 103.9 in wheelbase. Curb weight: 3,014–3,225 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 Trailblazer?
Owners have filed 196 complaints with NHTSA about the 2021 Chevrolet Trailblazer, most often about unspecified, electrical system, power train. Of those, 7 involved a crash, 3 a fire, 5 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 Trailblazer?
The EPA smog rating for the 2021 Chevrolet Trailblazer is 7 out of 10. 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, Federal Tier 3 Bin 30 — which the table above lists per configuration.
Are there service bulletins for the 2021 Chevrolet Trailblazer?
The manufacturer has filed 753 service bulletins and related communications with NHTSA for the 2021 Chevrolet Trailblazer, most often covering engine, equipment, 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 Trailblazer do at state inspection?
In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2021 Chevrolet Trailblazer failed the emissions check on 3.9% of first inspections — higher than the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 1.9% (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 | 3 configurations | EPA certification records | Every configuration the EPA certified for sale, with its own test figures. |
| Emission certificates | 3 configurations | EPA emission certificates | Smog rating, standard and the sales area that decides where the car can be sold new. |
| Recalls | 4 | NHTSA recall campaigns | A complete federal register: every campaign covering this model year, with severity and advisory flags. |
| Owner complaints | 196 | NHTSA complaint database | Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold. |
| Crash ratings | 4 tested | NHTSA NCAP | Only the configurations NHTSA chose to crash-test, which is never all of them. |
| Service bulletins | 753 | 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.