Research · complaint index
Chevrolet Trailblazer Ext years to avoidWhat NHTSA complaint data does and doesn’t say
We compared 5 model years of the Chevrolet Trailblazer Ext by owner complaints to NHTSA, adjusted for how long each year has been on the road. No single year stands far above the rest.
Complaints per year on the road
1.0 = typical year for this model
| Year | Complaints | Per year on road | Index | Recalls | Crashes | Signal |
|---|---|---|---|---|---|---|
| 2006 | 1,313 | 63 | 1.1 | 6 | 31 | Typical |
| 2005 | 1,703 | 77 | 1.3 | 0 | 66 | Typical |
| 2004 | 1,357 | 59 | 1.0 | 1 | 63 | Typical |
| 2003 | 1,255 | 52 | 0.9 | 3 | 76 | Typical |
| 2002 | 1,268 | 51 | 0.9 | 3 | 109 | Typical |
- 20061,313 complaints · 6 recallsTypical
- 20051,703 complaints · 0 recallsTypical
- 20041,357 complaints · 1 recallTypical
- 20031,255 complaints · 3 recallsTypical
- 20021,268 complaints · 3 recallsTypical
Data from NHTSA Complaints & Recalls APIs · synced Nov 10, 2026
About this comparison
What Chevrolet Trailblazer Ext years have the most complaints?
No Chevrolet Trailblazer Ext model year drew more than twice the typical complaint rate among the 5 model years compared. The highest was 2005.
Is this a reliability rating?
No. These are counts of unverified owner complaints to NHTSA. They are not adjusted for how many cars were sold, so a popular year can collect more complaints. Use them to find patterns, then read the reports.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.