GMC Sonoma owners have reported a total of 1,044 problems for their cars built in the 10 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the GMC Sonoma. The 1998 GMC Sonoma cars have the most problems reported (200 problems).
| Model Year | Number of Problems |
|---|---|
| 2005 Sonoma | |
| 2004 Sonoma | |
| 2003 Sonoma | |
| 2002 Sonoma | |
| 2001 Sonoma | |
| 2000 Sonoma | |
| 1999 Sonoma | |
| 1998 Sonoma | |
| 1997 Sonoma | |
| 1996 Sonoma |
The following chart shows the 23 most common problems for GMC Sonoma cars. The number one most common problem is related to the vehicle's service brakes, hydraulic (201 problems). The second most common problem is related to the vehicle's visibility (128 problems).
It would not be fair to compare the GMC Sonoma of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across Sonoma model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.
PPMY = P / S / Y * 1000,
where P = total problems reported during the life of a GMC Sonoma model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).
The results are shown in Table 3.
Another way to measure the reliability across the model years of the GMC Sonoma is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.
| Model Year | Problems Reported |
|---|---|
| 2003 Sonoma | |
| 2002 Sonoma | |
| 2001 Sonoma | |
| 2000 Sonoma | |
| 1999 Sonoma | |
| 1998 Sonoma | |
| 1997 Sonoma | |
| 1996 Sonoma |
| ☘ Sonoma Service Bulletins |
| ⚑ Sonoma Safety Recalls |
| ☤ Sonoma Defect Investigations |
| Compare Reliability: |