129 problems have been reported for the 2003 GMC Sierra 2500. The following chart shows the 20 most common problems for 2003 GMC Sierra 2500. The number one most common problem is related to the vehicle's service brakes, hydraulic with 55 problems. The second most common problem is related to the vehicle's electrical system (22 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 2003 GMC Sierra 2500 in the United States are 56,096 units [1]. If the total number of problems reported by GMC Sierra 2500 owners in the last 19 years is 129, and the age of the vehicle is 19, the PPMY index can then be calculated as
PPMY Index = 129 / 56,096 / 19 * 1000 = 0.12.
For more information, refer to this page: A study of reliability comparison across GMC Sierra 2500 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2003 GMC Sierra 2500 in 2003.
| Service Year | Number of Problems |
|---|---|
| 2022 | |
| 2021 | |
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| 2015 | |
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| 2003 |
When making the decision between buying a new or used GMC Sierra 2500, the following table can be used to compare the 2003 GMC Sierra 2500 with the GMC Sierra 2500 from other model years. Note that the number of problems reported for the 2003 Sierra 2500 is 129 while the average number of problems reported for the 25 model years of the GMC Sierra 2500 is 56.