247 problems have been reported for the 2021 Chevrolet Trailblazer. The following chart shows the 22 most common problems for 2021 Chevrolet Trailblazer. The number one most common problem is related to the vehicle's equipment with 48 problems. The second most common problem is related to the vehicle's power train (36 problems).
In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the problems reported per thousand vehicles per Year. The total sales of the 2021 Chevrolet Trailblazer in the United States are 90,380 units [1]. If the total number of problems reported by Chevrolet Trailblazer owners in the last 5 years is 247, and the age of the vehicle is 5, the PPMY index can then be calculated as
PPMY Index = 247 / 90,380 / 5 * 1000 = 0.55.
For more information, refer to this page: A study of reliability comparison across Chevrolet Trailblazer model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 Chevrolet Trailblazer in 2021.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used Chevrolet Trailblazer, the following table can be used to compare the 2021 Chevrolet Trailblazer with the Chevrolet Trailblazer from other model years. Note that the number of problems reported for the 2021 Trailblazer is 247 while the average number of problems reported for the 18 model years of the Chevrolet Trailblazer is 537.