GMC Terrain

Fuel economy, running costs and specs by model year

The GMC Terrain appears in this database in 5 model years, from 2016 to 2020, offered with diesel and gasoline power. Combined economy ranges from 18 to 32 MPG across those years, with annual fuel costs of $2,300 to $3,600 at 15,000 miles.

Fuel economy by year

How it compares

Against the average small sport utility vehicle 2wd in this dataset (about 26 MPG), the Terrain sits roughly 1 MPG below that mark on average, making it a thirstier-than-average choice for its class.

Five-year fuel cost

Fuelling a Terrain for five years at the EPA's 15,000-mile basis costs roughly $11,500 to $18,000, averaging about $14,750 across the versions here. That is the energy bill alone — it excludes insurance, maintenance and depreciation, which for most owners together exceed what goes into the tank.

The range within the range

Economy across the Terrain varies by about 14 MPG between its most and least frugal versions, which run on diesel and gasoline. Engine size, turbocharging, drivetrain and even wheel size explain most of that gap, so when you shop a used Terrain check which version you are looking at before comparing its running cost to another car.

How it changed over time

Between 2016 and 2020 the Terrain's average combined economy improved from about 22 to 25 MPG. Redesigns, new engines and added hybrid or electric versions are usually what move the number, so the year you choose can matter as much as the model.

Best year for fuel economy

The 2019 Terrain has the strongest average combined economy in this database at about 28 MPG, while the 2017 is the lowest at about 22 MPG. If running cost is your priority, that is the year to target on the used market; later years may add equipment or safety features instead.

2020 Terrain at a glance

Use the comparison tool to set the Terrain against a rival, or go back to all GMC models.