27 problems have been reported for the 2008 GMC Sierra 3500. The following chart shows the 10 most common problems for 2008 GMC Sierra 3500. The number one most common problem is related to the vehicle's air bags with 17 problems. The second most common problem is related to the vehicle's tires (2 problems).
| Problem Category | Number of Problems |
|---|---|
| Air Bag | |
| Tire | |
| Engine And Engine Cooling | |
| Service Brakes | |
| Electrical System | |
| Equipment | |
| Other Fuel System | |
| Gasoline Fuel System | |
| Diesel Fuel System | |
| Power Train |
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 2008 GMC Sierra 3500 in the United States are 2,486 units [1]. If the total number of problems reported by GMC Sierra 3500 owners in the last 18 years is 27, and the age of the vehicle is 18, the PPMY index can then be calculated as
PPMY Index = 27 / 2,486 / 18 * 1000 = 0.60.
For more information, refer to this page: A study of reliability comparison across GMC Sierra 3500 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2008 GMC Sierra 3500 in 2008.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 | |
| 2008 |
When making the decision between buying a new or used GMC Sierra 3500, the following table can be used to compare the 2008 GMC Sierra 3500 with the GMC Sierra 3500 from other model years. Note that the number of problems reported for the 2008 Sierra 3500 is 27 while the average number of problems reported for the 31 model years of the GMC Sierra 3500 is 23.