AutoUtility currently tracks 190 official NHTSA owner defect complaints for the 2021 Chevrolet Trailblazer. Electrical System issues are the most frequently reported category, appearing in 40 complaints (21.1% of submitted records). Among these NHTSA complaint records, 7 filings cite a crash, 3 cite a fire, 4 report one or more injuries.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
40 owner complaints submitted to NHTSA ODI for this subsystem.
38 owner complaints submitted to NHTSA ODI for this subsystem.
31 owner complaints submitted to NHTSA ODI for this subsystem.
30 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.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"Shifter"
"My timing belt snapped prematurely, causing a total loss of engine power while driving on the highway, which is a severe safety hazard"
"I am submitting this report regarding my 2021 Chevrolet Trailblazer because it has been experiencing the "Shift to Park" issue described in the GM bulletin 19-NA-206. Even when the vehicle is shifted into Park, it intermittently displays a "Shift to Park" message and does not recognize that the..."
""shift to park" issue on a 21 traiblazer causing your car to not being able to shutdown entirely meanwhile the shift is perfectly on Park."
"Vehicle displays Shift to Park when vehicle is in park & you push the ignition button & audible chime occurs. Apparently this is a known issue for Chevrolet Trailblazers & Buick Encore GX vehicles model year 2021 & newer. You have to either wiggle the gear shifter several times & depress/wiggle the..."
Reported defect complaint volume across sibling model years (2021–2026)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2021 Chevrolet Trailblazer Current Page | 190 | 7 | 4 | Current |
| 2022 Chevrolet Trailblazer | 107 | 3 | 1 | View 2022 Problems → |
| 2023 Chevrolet Trailblazer | 65 | 4 | 0 | View 2023 Problems → |
| 2024 Chevrolet Trailblazer | 32 | 3 | 0 | View 2024 Problems → |
| 2025 Chevrolet Trailblazer | 19 | 0 | 0 | View 2025 Problems → |
| 2026 Chevrolet Trailblazer | 0 | 0 | 0 | View 2026 Problems → |
Complete distribution of consumer defect reports across all 60 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 33 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 25 | 1 | 1 | 0 | 0 |
| Engine NHTSA category: ENGINE | 17 | 0 | 1 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 13 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 12 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER | 8 | 0 | 0 | 0 | 0 |
| ENGINE,FUEL/PROPULSION SYSTEM | 5 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 5 | 0 | 0 | 0 | 0 |
| Structure & Body NHTSA category: STRUCTURE | 4 | 0 | 0 | 1 | 0 |
| ELECTRICAL SYSTEM,ENGINE | 3 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE | 3 | 1 | 1 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM | 3 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ENGINE | 3 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,FORWARD COLLISION AVOIDANCE | 3 | 2 | 0 | 3 | 0 |
| Visibility & Wipers NHTSA category: VISIBILITY/WIPER | 3 | 0 | 0 | 0 | 0 |
| Equipment & Accessories NHTSA category: EQUIPMENT | 2 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | 2 | 0 | 0 | 0 | 0 |
| POWER TRAIN,UNKNOWN OR OTHER | 2 | 0 | 0 | 0 | 0 |
| STRUCTURE,UNKNOWN OR OTHER | 2 | 0 | 0 | 0 | 0 |
| Tires NHTSA category: TIRES | 2 | 0 | 0 | 0 | 0 |
| AIR BAGS,FORWARD COLLISION AVOIDANCE | 1 | 1 | 0 | 0 | 0 |
| AIR BAGS,WHEELS | 1 | 0 | 0 | 0 | 0 |
| Back Over Prevention / Camera NHTSA category: BACK OVER PREVENTION | 1 | 0 | 0 | 0 | 0 |
| CHILD SEAT | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,AIR BAGS,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,BACK OVER PREVENTION | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,STRUCTURE,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING | 1 | 0 | 0 | 0 | 0 |
| ENGINE AND ENGINE COOLING,ENGINE | 1 | 0 | 0 | 0 | 0 |
| EXTERIOR LIGHTING,VISIBILITY/WIPER | 1 | 0 | 0 | 0 | 0 |
| Fuel System NHTSA category: FUEL SYSTEM, GASOLINE | 1 | 0 | 0 | 0 | 0 |
| INSERT, PADDING | 1 | 0 | 0 | 0 | 0 |
| LANE DEPARTURE,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,VEHICLE SPEED CONTROL,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES, HYDRAULIC | 1 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES, HYDRAULIC,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Steering NHTSA category: STEERING | 1 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| STEERING,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| STEERING,SERVICE BRAKES,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,SERVICE BRAKES,LANE DEPARTURE | 1 | 1 | 0 | 0 | 0 |
| STEERING,VEHICLE SPEED CONTROL,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STRUCTURE,WHEELS,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Suspension NHTSA category: SUSPENSION | 1 | 0 | 0 | 0 | 0 |
| TETHER, LOWER ANCHOR (ON CAR SEAT OR VEHICLE) | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,BACK OVER PREVENTION | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| Vehicle Speed Control NHTSA category: VEHICLE SPEED CONTROL | 1 | 1 | 0 | 1 | 0 |
| VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| VEHICLE SPEED CONTROL,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| Wheels & Hubs NHTSA category: WHEELS | 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 Trailblazer
In official NHTSA consumer records, the most frequently cited issue area for the 2021 Chevrolet Trailblazer is Electrical System, appearing in 40 records (21.1% of submitted filings).
Secondary reported categories include Powertrain & Transmission (38) and Brakes & Traction Control (31).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 190 consumer defect complaints and 4 safety recall campaigns for the 2021 Chevrolet Trailblazer.
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 Trailblazer, 7 filings cite a crash, 3 cite smoke or fire, and 4 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.