Based on data from 81 vehicles, 7,726 fuel-ups and 2,531,061 miles of driving, the 2018 GMC Terrain gets a combined Avg MPG of 28.40 with a 0.19 MPG margin of error.

Any Engine Type 1.5L L4 GAS (23) 1.6L L4 DIESEL (26) 2.0L L4 GAS (31) Any Body Style Sport Utility (25) Any Submodel Denali (16) SLE (29) SLT (36)

Below you can see a distribution of the fuel-ups with 73 outliers (0.94%) removed.

Following shows the average MPG of each of the 81 vehicles in the system.

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• Andy&Karens Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2018 • 249 Fuel-ups

  Property of kandy

• 28.4 Avg MPG

• 2018 Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Dec 2019 • 281 Fuel-ups

  Property of sarwagwin

• 37.0 Avg MPG

• Terrain Diesel

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Jul 2021 • 311 Fuel-ups

  Property of bwelsh321

• 35.0 Avg MPG

• Nolan - Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 6 Speed
  Added Aug 2023 • 86 Fuel-ups

  Property of jheinzl

• 19.2 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed
  Added May 2018 • 257 Fuel-ups

  Property of nstp97

• 32.2 Avg MPG

• Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Dec 2017 • 105 Fuel-ups

  Property of red5_5

• 26.9 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Dec 2020 • 46 Fuel-ups

  Property of Niff42

• 21.9 Avg MPG

• Black Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 300 Fuel-ups

  Property of TerrainTracker

• 32.2 Avg MPG

• Trichs Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Jun 2018 • 305 Fuel-ups

  Property of Hammer46

• 26.8 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added May 2021 • 205 Fuel-ups

  Property of wrightjd2

• 21.4 Avg MPG

• GMC

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Jun 2021 • 198 Fuel-ups

  Property of kamilw

• 36.4 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added May 2020 • 142 Fuel-ups

  Property of kendiesel85

• 25.2 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Feb 2018 • 375 Fuel-ups

  Property of KBender

• 19.5 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 6 Speed
  Added Feb 2023 • 80 Fuel-ups

  Property of ChuckP62

• 26.3 Avg MPG

• 2018 GMC Terrain Denali

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Nov 2017 • 265 Fuel-ups

  Property of Dusty-34063

• 27.4 Avg MPG

• BlackCloud’s '18 Terrain Diesel

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added May 2019 • 232 Fuel-ups

  Property of Cyanide

• 38.7 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Jan 2018 • 133 Fuel-ups

  Property of FuelCricket

• 23.6 Avg MPG

• Terrain 2018

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Mar 2021 • 220 Fuel-ups

  Property of mark6804

• 21.4 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Dec 2017 • 267 Fuel-ups

  Property of mbergner

• 23.9 Avg MPG

• Dad's Terrain

  2018 GMC Terrain SLE 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Jun 2019 • 134 Fuel-ups

  Property of HerbTarlek

• 26.7 Avg MPG

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