Based on data from 48 vehicles, 4,942 fuel-ups and 1,440,789 miles of driving, the 2017 GMC Terrain gets a combined Avg MPG of 21.78 with a 0.12 MPG margin of error.

Any Engine Type 2.4L L4 FLEX (12) 2.4L L4 GAS (22) 3.6L V6 FLEX (1) 3.6L V6 GAS (11) Any Body Style Sport Utility (17) Any Submodel SL (3) Denali (8) SLT (10) SLE (27)

Below you can see a distribution of the fuel-ups with 74 outliers (1.48%) removed.

Following shows the average MPG of each of the 48 vehicles in the system.

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• GMC Terrain

  2017 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed
  Added Sep 2016 • 251 Fuel-ups

  Property of ilvikngfan

• 20.6 Avg MPG

• 2017 GMC Terrain

  2017 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Sep 2017 • 14 Fuel-ups

  Property of ccmaydew

• 23.4 Avg MPG

• My Terrain

  2017 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Oct 2021 • 4 Fuel-ups

  Property of kimlatshaw

• 20.0 Avg MPG

• Ruby

  2017 GMC Terrain Denali 3.6L V6 FLEX Automatic 6 Speed
  Added Mar 2017 • 213 Fuel-ups

  Property of JesCo02

• 18.8 Avg MPG

• My Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Oct 2017 • 119 Fuel-ups

  Property of bandmomma

• 19.6 Avg MPG

• Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jan 2018 • 183 Fuel-ups

  Property of KVal7

• 21.1 Avg MPG

• White Jimmy

  2017 GMC Terrain Denali 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jul 2020 • 49 Fuel-ups

  Property of dovey413gmailcom

• 26.5 Avg MPG

• Terrain

  2017 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jun 2020 • 7 Fuel-ups

  Property of mkcottle

• 24.0 Avg MPG

• 2017 Terrain

  2017 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Feb 2018 • 114 Fuel-ups

  Property of Firefotog

• 22.7 Avg MPG

• 2017 Terrain

  2017 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Mar 2023 • 114 Fuel-ups

  Property of Firefotog

• 22.7 Avg MPG

• 2017 Terrain

  2017 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Jul 2017 • 97 Fuel-ups

  Property of gtosuper98

• 21.6 Avg MPG

• 2017 Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Apr 2017 • 95 Fuel-ups

  Property of John733

• 20.6 Avg MPG

• My Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Oct 2019 • 19 Fuel-ups

  Property of jeff6605

• 22.2 Avg MPG

• 2017 GMC Terrain SLE2

  2017 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Jan 2017 • 125 Fuel-ups

  Property of wshier

• 19.9 Avg MPG

• My Terrain

  2017 GMC Terrain Denali 2.4L L4 FLEX Automatic 6 Speed
  Added Jan 2018 • 65 Fuel-ups

  Property of gascost

• 18.6 Avg MPG

• 2017 Terrain

  2017 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Jun 2017 • 64 Fuel-ups

  Property of mwcorder

• 21.2 Avg MPG

• My Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Mar 2017 • 63 Fuel-ups

  Property of AT1106

• 21.8 Avg MPG

• White Terrain

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Apr 2017 • 143 Fuel-ups

  Property of TheRealTexx

• 23.8 Avg MPG

• Z Sold Terrain

  2017 GMC Terrain Denali 3.6L V6 GAS Automatic 6 Speed Sport Utility
  Added Oct 2017 • 4 Fuel-ups

  Property of brianlt055

• 16.8 Avg MPG

• WHITE OPS TERRAIN

  2017 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jul 2017 • 41 Fuel-ups

  Property of foxiius

• 20.9 Avg MPG

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