559 problems have been reported for the 2021 Chevrolet Tahoe. The following chart shows the 23 most common problems for 2021 Chevrolet Tahoe. The number one most common problem is related to the vehicle's engine and engine cooling with 152 problems. The second most common problem is related to the vehicle's fuel system, other (84 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 Tahoe in the United States are 129,842 units [1]. If the total number of problems reported by Chevrolet Tahoe owners in the last 5 years is 559, and the age of the vehicle is 5, the PPMY index can then be calculated as
PPMY Index = 559 / 129,842 / 5 * 1000 = 0.86.
For more information, refer to this page: A study of reliability comparison across Chevrolet Tahoe 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 Tahoe in 2021.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used Chevrolet Tahoe, the following table can be used to compare the 2021 Chevrolet Tahoe with the Chevrolet Tahoe from other model years. Note that the number of problems reported for the 2021 Tahoe is 559 while the average number of problems reported for the 31 model years of the Chevrolet Tahoe is 367.