AI DamageChevrolet Trailblazer: problems, complaints, bulletins
Summary for the Chevrolet Trailblazer across 11 model years: 443 owner complaints and 1,055 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Electrical system 26% of all complaints
- 2 Powertrain 23% of all complaints
- 3 Engine 19% of all complaints
- 4 Service brakes 16% of all complaints
- 5 Forward collision avoidance 7% of all complaints
- 6 Fuel/propulsion system 6% of all complaints
- 7 Steering 4% of all complaints
- 8 Structure 3% of all complaints
- Electrical system: 114 complaints (26% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 807.
- Powertrain: 100 complaints (23% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 457.
- Engine: 84 complaints (19% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 407.
- Service brakes: 72 complaints (16% of all), 4 of them with a crash reported by the owner; manufacturer bulletins for this component: 116.
- Forward collision avoidance: 30 complaints (7% of all), 7 of them with a crash reported by the owner; manufacturer bulletins for this component: 25.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 1.2 L · petrol · turbo · 3 cyl 2021–2026named in 1 complaints
- 1.3 L · petrol · turbo · 3 cyl 2021–2026named in 1 complaints
- 4.2 L · petrol · 6 cyl 2002–2009
- 5.3 L · petrol · 8 cyl 2003–2009
- 6 L · petrol · 8 cyl 2006–2009
- automatic, 4-speed 2002–2009
- automatic, 9-speed 2021–2026
- CVT 2021–2026named in 1 complaints
Drive: AWD, RWD, FWD
Symptoms owners describe
How many of the 443 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 114 | 3 | 807 |
| Powertrain | 100 | 3 | 457 |
| Engine | 84 | 3 | 407 |
| Service brakes | 72 | 4 | 116 |
| Forward collision avoidance | 30 | 7 | 25 |
| Fuel/propulsion system | 25 | 0 | 47 |
| Steering | 16 | 1 | 95 |
| Structure | 14 | 0 | 158 |
| Visibility | 11 | 1 | 76 |
| Vehicle speed control | 10 | 3 | 20 |
| Lane departure | 10 | 3 | 15 |
| Air bags | 10 | 6 | 7 |
| Backover prevention | 9 | 0 | 26 |
| Engine and cooling | 7 | 0 | 600 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
We were approaching a turn onto highway [XXX] and there was slowed or stopped traffic in front of us, we slowed to a stop and then was hit very hard from behind by a newer Mustang.ihad my seat belt on, as usual, but we were hit so hard i hit my face on the dash, causing pain and a bloody nose, swollen lips and head…
Monic was backing out of driveway and indicates her backup camera and sensors were not functioning, she looked in her mirrors and did not see the vehicle so continued and collided with a parked/unoccupied vehicle. Liberty Mutual [ref]
No front end collision warning alarms went off. No automatic breaking occurred. No airbag deployed. None of the vehicle safety and anti collision measures performed as I had expected. $10,000 worth of damage to my car alone.
I was stopped at a red light. When the light turned green I entered the intersection, the LKA system began alerting me and pulling the vehicle towards the oncoming left traffic turn lane. I took my foot off the accelerator and reached over to shut the LKA off as it was pulling my vehicle.
Two weeks before the accident, a warning message appeared on my car’s dashboard stating: “FORWARD COLLISION SYSTEM REDUCED.” Naturally, I was concerned. I immediately contacted the dealership, but they failed to return my call. I followed up a few days later, and they told me to bring the car in the next day.
A loud popping noise heard through the radio when light pressure applied to brakes. Noise loud enough to scare the hell out of all the occupants in the car. Brakes squeaked when car was in reverse. Tried to slow down on wet pavement. Car started to veer to the right.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- PI created to guide technicians through radio restriction process
- This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is…
- This preliminary information is for technicians that may see DTCs that are history and should not perform…
- This Preliminary information communicates to dealers a procedure to reset the radio
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a…
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- This Preliminary Information provides the dealer information of the location of the rear seat child anchors
- This Preliminary Information provides a diagnostic tip for diagnosing an issue with Cruise Control,…
- This Preliminary information communicates to the technicians a diagnostic tip if a technician loses…
- Special Coverage
- This Preliminary information communicates to the technician the repairs direction for addressing a…
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
- The 2026 Chevy Trailblazer will SURPRISE You! 🤯amount per author: 25,000 UNSPECIFIED_DOLLAR
- turbo replacement on 2021 trailblazer.
- 2021 chevy trailblazer oil life reset #cars #automobile #mechanic #car #chevy
- Rebuilding a 2021 Chevy Trailblazer Part 2
- How replace is this filter on a 2021 Chevy trailblazer
- 2026 Trailblazer Feature Deep Dive
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.