2021 Chevrolet TRAILBLAZER problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
192 owner complaints analyzed
4 distinct recall campaigns
20,000 mi median reported failure mileage
Scope: 2021 model year. Data snapshot: . 32 complaints include usable failure mileage.
Most common problems
Unknown Or Other is the most frequently named component, appearing in 53 of 192 complaints (27.6%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 34 | 17.7% |
| Transmission and shifting | 27 | 14.1% |
| Electrical and battery issues | 25 | 13.0% |
| Steering behavior | 11 | 5.7% |
| Engine operation | 9 | 4.7% |
| Fuel system concerns | 8 | 4.2% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Unknown Or Other | 53 |
| Electrical System | 40 |
| Power Train | 40 |
| Engine | 38 |
| Service Brakes | 29 |
| Fuel/Propulsion System | 17 |
| Forward Collision Avoidance: Automatic Emergency Braking | 8 |
| Steering | 6 |
Unknown Or Other: 53; Electrical System: 40; Power Train: 40; Engine: 38; Service Brakes: 29; Fuel/Propulsion System: 17; Forward Collision Avoidance: Automatic Emergency Braking: 8; Steering: 6
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 19 |
| 25,000 to 49,999 | 7 |
| 50,000 to 74,999 | 1 |
| 75,000 to 99,999 | 3 |
| 100,000 to 149,999 | 2 |
| 150,000 and above | 0 |
Under 25,000: 19; 25,000 to 49,999: 7; 50,000 to 74,999: 1; 75,000 to 99,999: 3; 100,000 to 149,999: 2; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (19). 160 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2020 | 6 |
| 2021 | 20 |
| 2022 | 17 |
| 2023 | 15 |
| 2024 | 46 |
| 2025 | 48 |
| 2026 | 40 |
2020: 6; 2021: 20; 2022: 17; 2023: 15; 2024: 46; 2025: 48; 2026: 40
Pattern summary
Unknown Or Other leads the component reports. Braking behavior appears in 34 complaint narratives. Transmission and shifting appears in 27 complaint narratives. Electrical and battery issues appears in 25 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11361549 · 2020-09-28 (September 28, 2020)
BRAKES REQUIRED EXTREME PRESSURE TO STOP THE VEHICLE. ACCIDENT BARELY AVOIDED DURING RUSH HOUR TRAFFIC ON BUSY SURFACE ROAD.
Owner-reported narrative. 1,075 miles reported. Look up ODI 11361549 at NHTSA ↗
Owner report 11374603 · 2020-11-13 (November 13, 2020)
WHEN PARKING OR ABOUT TO MOVE AND YOU PUT FOOT ON BRAKE AND GET INTO A GEAR A LOUD AUDIBLE POPPING NOISE COMES THROUGH THE STEREO SYSTEM. IT IS VERY LOUD AND NOT BASED ON HOW LOW OR HIGH THE VOLUME OF THE STEREO IS SET. THERE IS A THREAD ON TRAILBLAZERTALK.COM ABOUT IT NOW. HTTPS://WWW.TRAILBLAZERTALK.COM/THREADS/POPPING-NOISE-IN-RADIO-WHEN-BRAKES-APPLIED.244/#POST-1557
Owner-reported narrative. 4,500 miles reported. Look up ODI 11374603 at NHTSA ↗
Owner report 11481702 · 2022-08-29 (August 29, 2022)
I have had the 2021 Chevy Trailblazer since May 2021, it has been 15 months, not even a year and a half off the lot and i have had wayyyy too many problems. I have has service the stabilitrak stability control system, service the antilock breaking system multiple times within the first 8-10 months. I had to get a part replaced due to that. The dealership had my vehicle literally for a month after i bought it, had an open tak report through Gm due to my engine light coming on. Gm did not know why it was happening. Had 2 service engine and transm…
Owner-reported narrative. Look up ODI 11481702 at NHTSA ↗
Owner report 11574998 · 2024-03-02 (March 2, 2024)
Whenever I accelerate over 65 miles per hour the engine and transmission light comes on and the car goes into reduced engine speed. I get a message to service my engine I took it to the dealership, they could not figure out the problem because the engine light only stays on for a day or so and then goes out again. This issue has been happening more frequently over the last few weeks.
Owner-reported narrative. Look up ODI 11574998 at NHTSA ↗
Owner report 11440926 · 2021-11-18 (November 18, 2021)
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. The contact had to restart the vehicle to correct the failure. The failure was intermittent. The vehicle was taken to the dealer however, the dealer could not duplicate the failure. The vehicle was taken to another dealer, Frontier Mo…
Owner-reported narrative. 1,574 miles reported. Look up ODI 11440926 at NHTSA ↗
Owner report 11415441 · 2021-05-06 (May 6, 2021)
I WAS DRIVING MY BRAND NEW 2021 TRAILBLAZER (ONLY 160 MILES) AND STEPPED ON THE BRAKE TO STOP AT THE END OF A STREET. SUDDENLY, I GOT ALERTS THAT MY BRAKE SYSTEM HAD FAILED AND RIGHT AFTER THAT, ANOTHER ONE, SAYING THAT THE POWER STEERING NEEDED TO BE SERVICED. AT THAT POINT, IT REQUIRED MUCH MORE PRESSURE ON THE BRAKE TO STOP, AND THE BRAKES DIDN'T SEEM VERY RESPONSIVE. LATER I SHUT OFF THE ENGINE, AND WHEN I STARTED IT AGAIN, THE CHECK ENGINE LIGHT WAS STILL ON, BUT I THINK THE BRAKES WERE WORKING AGAIN. I'M NOT SURE BECAUSE I DIDN'T WANT TO …
Owner-reported narrative. 160 miles reported. Look up ODI 11415441 at NHTSA ↗
Owner report 11659117 · 2025-05-05 (May 5, 2025)
Upon starting vehicle it would idle for 30secs to 1 minute before shutting completely down, then would prompt to engage brake and push start/stop button to turn back on. Two different times while driving at 60+ mph the vehicle completely stalled losing power steering and brakes. Both times when the vehicle shut down it would say to push start/stop button and then place vehicle in park, engage brake to restart. When the vehicle stalled I was getting onto a highway and was about 2 seconds from being hit from behind by a semi while I was at almost…
Owner-reported narrative. Look up ODI 11659117 at NHTSA ↗
Owner report 11676063 · 2025-07-24 (July 24, 2025)
Vehicle Diagnostic Summary – Trouble Codes Explained 1. P0562 – System Voltage Low The vehicle’s electrical system is running at low voltage. This could be due to a weak battery, a failing alternator, or poor electrical connections. It may cause various electronic issues and unexpected shutdowns if not fixed. 2. P1005 – Fuel Level Sensor Control Module: Too Many Resets The fuel level sensor module has been reset too many times, likely due to electrical glitches. This may cause the fuel gauge to be inaccurate or unstable. 3. P14C0 / P14CD – F…
Owner-reported narrative. Look up ODI 11676063 at NHTSA ↗
Owner report 11463924 · 2022-05-09 (May 9, 2022)
Second time in dealership shop to get gas smell coming from engine. Vehicle still under warranty. Afraid of the vehicle catching fire on me. Took it into another repair shop and 2 technicians notice the strong gas odor and was afraid of working on it.
Owner-reported narrative. Look up ODI 11463924 at NHTSA ↗