Based on data from 100 vehicles, 8,716 fuel-ups and 2,580,834 miles of driving, the 2012 GMC Terrain gets a combined Avg MPG of 20.83 with a 0.09 MPG margin of error.

Any Engine Type 2.4L L4 FLEX (21) 2.4L L4 GAS (26) 3.0L V6 FLEX (11) 3.0L V6 GAS (19) H2 GAS (1) L4 GAS (13) V6 GAS (1) Any Body Style Sedan (1) Sport Utility (29) Any Submodel SLT (42) SLE (43) Other (15)

Below you can see a distribution of the fuel-ups with 205 outliers (2.30%) removed.

Following shows the average MPG of each of the 100 vehicles in the system.

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• Terrain

  2012 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Sep 2017 • 431 Fuel-ups

  Property of jochmaster

• 21.1 Avg MPG

• Terrain

  2012 GMC Terrain SLT 3.0L V6 GAS Automatic 6 Speed Sport Utility
  Added Feb 2025 • 11 Fuel-ups

  Property of jaiannazzo

• 21.9 Avg MPG

• My Terrain

  2012 GMC Terrain SLT 3.0L V6 GAS Automatic 6 Speed
  Added Oct 2024 • 11 Fuel-ups

  Property of chris4851

• 16.8 Avg MPG

• GMC Terrain

  2012 GMC Terrain SLE Automatic 6 Speed Sport Utility
  Added Apr 2024 • 67 Fuel-ups

  Property of Doylematthew73

• 23.0 Avg MPG

• ‘12 Terrain

  2012 GMC Terrain SLE 3.0L V6 GAS Automatic 6 Speed
  Added Jan 2024 • 34 Fuel-ups

  Property of drw4747

• 22.1 Avg MPG

• Alastar

  2012 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Feb 2019 • 210 Fuel-ups

  Property of GingerSnap

• 21.0 Avg MPG

• My Terrain

  2012 GMC Terrain SLE 3.0L V6 GAS Automatic 6 Speed
  Added Jul 2023 • 90 Fuel-ups

  Property of LindsayG34

• 19.6 Avg MPG

• My Terrain

  2012 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Jun 2023 • 42 Fuel-ups

  Property of nleiva1

• 22.5 Avg MPG

• Terrain

  2012 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Nov 2024 • 5 Fuel-ups

  Property of mortonjoel

• 17.4 Avg MPG

• Terrain

  2012 GMC Terrain SLT 3.0L V6 FLEX Automatic 6 Speed
  Added Apr 2022 • 71 Fuel-ups

  Property of f55d

• 16.3 Avg MPG

• 2012 Terrain

  2012 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added May 2020 • 295 Fuel-ups

  Property of ggoldie4p

• 22.9 Avg MPG

• 2012 GMC Terrain 3.0 Flex DOHC V6

  2012 GMC Terrain SLE 3.0L V6 FLEX Automatic 6 Speed
  Added Mar 2017 • 91 Fuel-ups

  Property of kthompson33

• 19.3 Avg MPG

• Terrain

  2012 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed
  Added Oct 2016 • 40 Fuel-ups

  Property of CowboyCadillac

• 20.5 Avg MPG

• 2012 GMC Terrain SLE-2

  2012 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Sep 2016 • 236 Fuel-ups

  Property of MyTerrain

• 29.2 Avg MPG

• My Terrain

  2012 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Nov 2018 • 7 Fuel-ups

  Property of nschonlau

• 17.3 Avg MPG

• My Terrain

  2012 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Jan 2022 • 91 Fuel-ups

  Property of lambo123

• 19.9 Avg MPG

• 2012 Terrain

  2012 GMC Terrain SLT 3.0L V6 FLEX Automatic 6 Speed Sport Utility
  Added Dec 2020 • 106 Fuel-ups

  Property of Winpooh

• 20.5 Avg MPG

• My Terrain

  2012 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Nov 2022 • 33 Fuel-ups

  Property of jacobdhendrix

• 19.1 Avg MPG

• Terrain

  2012 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Apr 2019 • 172 Fuel-ups

  Property of dsaale

• 20.1 Avg MPG

• My Terrain

  2012 GMC Terrain SLT 3.0L V6 GAS Automatic 6 Speed Sport Utility
  Added Sep 2021 • 23 Fuel-ups

  Property of MILESRICK

• 14.9 Avg MPG

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