AutoUtility currently tracks 128 official NHTSA owner defect complaints for the 2021 Chevrolet Blazer. Electrical System issues are the most frequently reported category, appearing in 37 complaints (28.9% of submitted records). Among these NHTSA complaint records, 6 filings cite a crash, 1 cites a fire, 5 report one or more injuries.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
37 owner complaints submitted to NHTSA ODI for this subsystem.
36 owner complaints submitted to NHTSA ODI for this subsystem.
20 owner complaints submitted to NHTSA ODI for this subsystem.
18 owner complaints submitted to NHTSA ODI for this subsystem.
Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis
4 complaint narratives describe this symptom.
3 complaint narratives describe this symptom.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"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 damage. I am requesting investigation into whether this represents a safety or..."
"Car will not crank, stalled while cranked, throws code P023F"
"While idling in my driveway, the engine started to shake and the check engine light came on. Got it diagnosed and was told by a private repair center that we had lost compression in cylinder 4 and that it was not worth the repair and we needed to replace the engine. Got it towed to the dealership,..."
"The contact owns a 2021 Chevrolet Blazer. The contact stated that while driving at approximately 50 MPH, the vehicle struck a deer, causing severe damage to the vehicle's front end. The contact stated that smoke was coming from the center of the steering wheel; however, the vehicle's air bags had..."
"The contact owns a 2021 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed, and the transmission was slipping gears before the vehicle lost motive power. The contact stated that the vehicle failed to drive forward or move while in..."
Reported defect complaint volume across sibling model years (2019–2026)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2019 Chevrolet Blazer | 185 | 4 | 2 | View 2019 Problems → |
| 2020 Chevrolet Blazer | 212 | 5 | 3 | View 2020 Problems → |
| 2021 Chevrolet Blazer Current Page | 128 | 6 | 1 | Current |
| 2022 Chevrolet Blazer | 47 | 2 | 1 | View 2022 Problems → |
| 2023 Chevrolet Blazer | 41 | 3 | 2 | View 2023 Problems → |
| 2024 Chevrolet Blazer | 42 | 5 | 1 | View 2024 Problems → |
| 2025 Chevrolet Blazer | 27 | 1 | 1 | View 2025 Problems → |
| 2026 Chevrolet Blazer | 0 | 0 | 0 | View 2026 Problems → |
Complete distribution of consumer defect reports across all 50 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Engine NHTSA category: ENGINE | 14 | 0 | 0 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 13 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 13 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 9 | 1 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 8 | 0 | 0 | 0 | 0 |
| Steering NHTSA category: STEERING | 6 | 1 | 0 | 1 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 6 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,ENGINE | 4 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM,UNKNOWN OR OTHER | 4 | 0 | 0 | 0 | 0 |
| Tires NHTSA category: TIRES | 4 | 0 | 0 | 0 | 0 |
| ENGINE,FUEL/PROPULSION SYSTEM | 3 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | 3 | 0 | 0 | 0 | 0 |
| Air Bags NHTSA category: AIR BAGS | 2 | 2 | 0 | 2 | 0 |
| POWER TRAIN,ENGINE | 2 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,FORWARD COLLISION AVOIDANCE | 2 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,ENGINE,LANE DEPARTURE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,EQUIPMENT | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,EXTERIOR LIGHTING,SEATS | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,WHEELS,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING | 1 | 0 | 0 | 0 | 0 |
| ENGINE AND ENGINE COOLING,POWER TRAIN | 1 | 0 | 0 | 0 | 0 |
| Forward Collision Avoidance NHTSA category: FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Fuel System NHTSA category: FUEL SYSTEM, GASOLINE | 1 | 0 | 0 | 0 | 0 |
| LANE DEPARTURE,BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| PARKING BRAKE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,UNKNOWN OR OTHER,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE | 1 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,ENGINE | 1 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,ENGINE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,POWER TRAIN | 1 | 0 | 0 | 0 | 0 |
| STEERING,POWER TRAIN,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| STEERING,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| Structure & Body NHTSA category: STRUCTURE | 1 | 0 | 0 | 0 | 0 |
| STRUCTURE,UNKNOWN OR OTHER,ENGINE | 1 | 0 | 1 | 0 | 0 |
| Suspension NHTSA category: SUSPENSION | 1 | 1 | 0 | 3 | 0 |
| SUSPENSION,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| SUSPENSION,ENGINE,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| SUSPENSION,FORWARD COLLISION AVOIDANCE | 1 | 1 | 0 | 1 | 0 |
| TRACTION CONTROL SYSTEM,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE,LANE DEPARTURE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2021 Chevrolet Blazer
In official NHTSA consumer records, the most frequently cited issue area for the 2021 Chevrolet Blazer is Electrical System, appearing in 37 records (28.9% of submitted filings).
Secondary reported categories include Engine & Cooling (36) and Brakes & Traction Control (20).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 128 consumer defect complaints and 1 safety recall campaign for the 2021 Chevrolet Blazer.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2021 Chevrolet Blazer, 6 filings cite a crash, 1 cite smoke or fire, and 5 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.