GMC Terrain owners have reported a total of 1,270 problems for their cars built in the 11 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 Terrain. The 2010 GMC Terrain cars have the most problems reported (317 problems).
The following chart shows the 24 most common problems for GMC Terrain cars. The number one most common problem is related to the vehicle's engine and engine cooling (305 problems). The second most common problem is related to the vehicle's visibility (176 problems).
|Problem Category||Number of Problems|
|Engine And Engine Cooling|
|Electronic Stability Control|
|Other Fuel System|
|Vehicle Speed Control|
|Gasoline Fuel System|
|Unknown Or Other|
|Traction Control System|
|Back Over Prevention|
It would not be fair to compare the GMC Terrain 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 Terrain 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 Terrain 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 Terrain 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|