389 problems have been reported for the 2005 Chevrolet Colorado. The following chart shows the 23 most common problems for 2005 Chevrolet Colorado. The number one most common problem is related to the vehicle's service brakes, hydraulic with 77 problems. The second most common problem is related to the vehicle's electrical system (69 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 2005 Chevrolet Colorado in the United States are 136,994 units [1]. If the total number of problems reported by Chevrolet Colorado owners in the last 20 years is 389, and the age of the vehicle is 20, the PPMY index can then be calculated as
PPMY Index = 389 / 136,994 / 20 * 1000 = 0.14.
For more information, refer to this page: A study of reliability comparison across Chevrolet Colorado model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2005 Chevrolet Colorado in 2005.
| Service Year | Number of Problems |
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| 2005 |
When making the decision between buying a new or used Chevrolet Colorado, the following table can be used to compare the 2005 Chevrolet Colorado with the Chevrolet Colorado from other model years. Note that the number of problems reported for the 2005 Colorado is 389 while the average number of problems reported for the 22 model years of the Chevrolet Colorado is 190.