777 problems have been reported for the 2021 GMC Yukon. The following chart shows the 26 most common problems for 2021 GMC Yukon. The number one most common problem is related to the vehicle's engine and engine cooling with 364 problems. The second most common problem is related to the vehicle's power train (98 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 GMC Yukon in the United States are 104,460 units [1]. If the total number of problems reported by GMC Yukon owners in the last 5 years is 777, and the age of the vehicle is 5, the PPMY index can then be calculated as
PPMY Index = 777 / 104,460 / 5 * 1000 = 1.49.
For more information, refer to this page: A study of reliability comparison across GMC Yukon model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 GMC Yukon in 2021.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used GMC Yukon, the following table can be used to compare the 2021 GMC Yukon with the GMC Yukon from other model years. Note that the number of problems reported for the 2021 Yukon is 777 while the average number of problems reported for the 31 model years of the GMC Yukon is 382.