60 problems have been reported for the 2021 GMC Sierra 2500. The following chart shows the 15 most common problems for 2021 GMC Sierra 2500. The number one most common problem is related to the vehicle's power train with 10 problems. The second most common problem is related to the vehicle's exterior lighting (9 problems).
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 GMC Sierra 2500 in 2021.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used GMC Sierra 2500, the following table can be used to compare the 2021 GMC Sierra 2500 with the GMC Sierra 2500 from other model years. Note that the number of problems reported for the 2021 Sierra 2500 is 60 while the average number of problems reported for the 30 model years of the GMC Sierra 2500 is 64.