Based on data from 75 vehicles, 5,573 fuel-ups and 1,827,439 miles of driving, the 2018 GMC Terrain gets a combined Avg MPG of 28.42 with a 0.22 MPG margin of error.

Any Engine Type 1.5L L4 GAS (23) 1.6L L4 DIESEL (23) 2.0L L4 GAS (28) Any Body Style Sport Utility (22) Any Submodel Denali (14) SLE (30) SLT (31)

Below you can see a distribution of the fuel-ups with 53 outliers (0.94%) removed.

Following shows the average MPG of each of the 75 vehicles in the system.

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• Terrain Diesel

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Jul 2021 • 172 Fuel-ups

  Property of bwelsh321

• 34.9 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Dec 2017 • 183 Fuel-ups

  Property of mbergner

• 23.9 Avg MPG

• Grey Ghost

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Sep 2021 • 112 Fuel-ups

  Property of drifter47

• 26.9 Avg MPG

• Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Nov 2021 • 67 Fuel-ups

  Property of artman1913

• 27.1 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed
  Added Apr 2019 • 95 Fuel-ups

  Property of superherofedman

• 39.1 Avg MPG

• 2018 Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Dec 2019 • 189 Fuel-ups

  Property of sarwagwin

• 36.8 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added May 2020 • 66 Fuel-ups

  Property of kendiesel85

• 24.2 Avg MPG

• Red Terrain

  2018 GMC Terrain SLE 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Aug 2022 • 28 Fuel-ups

  Property of chrishuntfish2

• 26.2 Avg MPG

• GMC Terrain Denali

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Feb 2021 • 96 Fuel-ups

  Property of nlatkinson

• 19.2 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added May 2021 • 108 Fuel-ups

  Property of wrightjd2

• 21.3 Avg MPG

• Terrain 2018

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Mar 2021 • 131 Fuel-ups

  Property of mark6804

• 20.4 Avg MPG

• Gmc Terrian

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 213 Fuel-ups

  Property of cjp_8476

• 34.1 Avg MPG

• 2018 GMC Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Nov 2017 • 227 Fuel-ups

  Property of Dusty-34063

• 27.5 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 6 Speed
  Added Jul 2022 • 167 Fuel-ups

  Property of darryltaber

• 23.5 Avg MPG

• Dad's Terrain

  2018 GMC Terrain SLE 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Jun 2019 • 82 Fuel-ups

  Property of HerbTarlek

• 26.6 Avg MPG

• Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Jul 2018 • 98 Fuel-ups

  Property of allen

• 31.8 Avg MPG

• Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 6 Speed
  Added Aug 2021 • 53 Fuel-ups

  Property of etombaugh

• 24.7 Avg MPG

• GMC

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Jun 2021 • 133 Fuel-ups

  Property of kamilw

• 37.4 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed
  Added May 2018 • 189 Fuel-ups

  Property of nstp97

• 32.6 Avg MPG

• Andy&Karens Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2018 • 187 Fuel-ups

  Property of kandy

• 28.5 Avg MPG

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