Based on data from 59 vehicles, 5,841 fuel-ups and 1,810,799 miles of driving, the 2014 GMC Terrain gets a combined Avg MPG of 21.00 with a 0.11 MPG margin of error.

Any Engine Type 2.4L L4 FLEX (4) 2.4L L4 GAS (27) 3.6L V6 FLEX (9) 3.6L V6 GAS (12) H4 GAS (2) V4 GAS (1) Any Body Style Sport Utility (21) Any Submodel Denali (6) SLE (24) SLT (27) Other (2)

Below you can see a distribution of the fuel-ups with 135 outliers (2.26%) removed.

Following shows the average MPG of each of the 59 vehicles in the system.

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• My Terrain

  2014 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Apr 2021 • 390 Fuel-ups

  Property of DWGEJohnson

• 20.8 Avg MPG

• F350

  2014 GMC Terrain SLT 3.6L V6 FLEX Automatic 6 Speed
  Added Mar 2017 • 333 Fuel-ups

  Property of wbettis

• 15.4 Avg MPG

• Momma Mobile

  2014 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added May 2023 • 112 Fuel-ups

  Property of andmar

• 22.5 Avg MPG

• 2014 GMC Terrain

  2014 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed
  Added Feb 2020 • 345 Fuel-ups

  Property of Wrench01

• 23.9 Avg MPG

• Charlene's GMC Terrain

  2014 GMC Terrain SLE V4 GAS Automatic 6 Speed Sport Utility
  Added Jan 2025 • 27 Fuel-ups

  Property of GMan09

• 14.2 Avg MPG

• My Terrain

  2014 GMC Terrain SLT 3.6L V6 FLEX Automatic 6 Speed
  Added Aug 2022 • 193 Fuel-ups

  Property of jcheney1

• 19.6 Avg MPG

• My Terrain

  2014 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Jul 2025 • 4 Fuel-ups

  Property of HunterFitch

• 20.8 Avg MPG

• Saint Patrice

  2014 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed Sport Utility
  Added Nov 2017 • 182 Fuel-ups

  Property of Wipester

• 20.3 Avg MPG

• GMC Terrain SLE

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Sep 2016 • 214 Fuel-ups

  Property of diablosandwich

• 23.9 Avg MPG

• Terrain

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Aug 2023 • 81 Fuel-ups

  Property of rplanansky

• 25.1 Avg MPG

• Teri's Terrain

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Jun 2025 • 5 Fuel-ups

  Property of Kody95

• 19.5 Avg MPG

• BooBooStink4

  2014 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed Sport Utility
  Added Aug 2023 • 114 Fuel-ups

  Property of SS-1

• 27.2 Avg MPG

• 2014 GMC Terrain SLT - BLACK

  2014 GMC Terrain SLT 3.6L V6 FLEX Automatic 6 Speed
  Added Feb 2025 • 8 Fuel-ups

  Property of Envisionit

• 16.1 Avg MPG

• My Terrain

  2014 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Oct 2024 • 11 Fuel-ups

  Property of werbo1

• 19.6 Avg MPG

• White Privilege

  2014 GMC Terrain Denali 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Mar 2022 • 120 Fuel-ups

  Property of darktonyll

• 17.7 Avg MPG

• Terrain

  2014 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed Sport Utility
  Added Feb 2021 • 312 Fuel-ups

  Property of nmanges

• 21.5 Avg MPG

• Terrain

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2016 • 352 Fuel-ups

  Property of datcar

• 25.3 Avg MPG

• GMC Terrain

  2014 GMC Terrain SLT 3.6L V6 FLEX Automatic 6 Speed Sport Utility
  Added Jun 2021 • 62 Fuel-ups

  Property of gfkelo

• 22.8 Avg MPG

• Stormie

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Mar 2019 • 114 Fuel-ups

  Property of rbrown86

• 25.6 Avg MPG

• My Terrain

  2014 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Feb 2021 • 52 Fuel-ups

  Property of suleymag

• 18.0 Avg MPG

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