2021 GMC Terrain MPG

Based on data from 12 vehicles, 1,052 fuel-ups and 263,204 miles of driving, the 2021 GMC Terrain gets a combined Avg MPG of 26.10 with a 0.24 MPG margin of error.

Below you can see a distribution of the fuel-ups with 38 outliers (3.49%) removed.

Following shows the average MPG of each of the 12 vehicles in the system.

• Terrain

  2021 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added May 2021 • 338 Fuel-ups

  Property of Que850

• 24.3 Avg MPG

• Terrain

  2021 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Jan 2023 • 186 Fuel-ups

  Property of 2xGrey

• 27.8 Avg MPG

• TERRAIN

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jul 2021 • 64 Fuel-ups

  Property of Gotham29

• 23.3 Avg MPG

• GMC Terrain

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2021 • 7 Fuel-ups

  Property of Jkasopsky

• 115.1 Avg MPG

• My Terrain

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2024 • 8 Fuel-ups

  Property of EvanHertzer

• 26.8 Avg MPG

• My Terrain

  2021 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Nov 2021 • 179 Fuel-ups

  Property of mcewen514

• 25.9 Avg MPG

• Satin Steel

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Feb 2021 • 36 Fuel-ups

  Property of rxmonchamp

• 25.5 Avg MPG

• 2021 GMC Terrain

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Feb 2023 • 189 Fuel-ups

  Property of terrymc1

• 27.9 Avg MPG

• AllTerrainVehicle

  2021 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Apr 2021 • 85 Fuel-ups

  Property of SilverSLE

• 32.3 Avg MPG

• Jo Ann's Upgrade

  2021 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jun 2021 • 39 Fuel-ups

  Property of mjshultz

• 24.0 Avg MPG

• GMC Terrain

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added May 2022 • 6 Fuel-ups

  Property of dcollin9

• 33.8 Avg MPG

• Dizzy

  2021 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jul 2021 • 7 Fuel-ups

  Property of SpaceEngineer

• 31.0 Avg MPG