Based on data from 79 vehicles, 6,844 fuel-ups and 2,257,167 miles of driving, the 2018 GMC Terrain gets a combined Avg MPG of 28.52 with a 0.20 MPG margin of error.

Any Engine Type 1.5L L4 GAS (23) 1.6L L4 DIESEL (26) 2.0L L4 GAS (29) Any Body Style Sport Utility (24) Any Submodel Denali (14) SLE (29) SLT (36)

Below you can see a distribution of the fuel-ups with 42 outliers (0.61%) removed.

Following shows the average MPG of each of the 79 vehicles in the system.

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• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Mar 2022 • 5 Fuel-ups

  Property of burnsey

• 24.3 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 6 Speed
  Added Jan 2020 • 98 Fuel-ups

  Property of adebbie24

• 25.7 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Mar 2019 • 160 Fuel-ups

  Property of sharmckel

• 27.5 Avg MPG

• Terrain

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Sep 2017 • 156 Fuel-ups

  Property of JoaoManuel

• 28.2 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 6 Speed
  Added Dec 2020 • 49 Fuel-ups

  Property of drifter47

• 25.1 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic Sport Utility
  Added Apr 2018 • 57 Fuel-ups

  Property of dperez80

• 25.0 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added May 2021 • 8 Fuel-ups

  Property of erichaddox

• 31.8 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Jul 2018 • 124 Fuel-ups

  Property of coughlinmp

• 26.8 Avg MPG

• Terrain ‘18

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2018 • 121 Fuel-ups

  Property of wabash

• 26.4 Avg MPG

• Blue Steel

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Apr 2018 • 29 Fuel-ups

  Property of rxmonchamp

• 25.5 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Dec 2017 • 110 Fuel-ups

  Property of dwb81

• 20.0 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Jan 2019 • 36 Fuel-ups

  Property of gtab

• 26.8 Avg MPG

• Hawkeye

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Oct 2020 • 10 Fuel-ups

  Property of Samari

• 25.5 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Sep 2020 • 10 Fuel-ups

  Property of Samari

• 27.1 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 2.0L L4 GAS Automatic 9 Speed
  Added Jan 2018 • 110 Fuel-ups

  Property of koolkev

• 19.5 Avg MPG

• Diesel Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Nov 2019 • 11 Fuel-ups

  Property of lovebohn

• 35.2 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed
  Added Jul 2018 • 134 Fuel-ups

  Property of qsterx

• 34.5 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Nov 2017 • 63 Fuel-ups

  Property of amtrak8

• 31.6 Avg MPG

• Pollywog

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Dec 2019 • 42 Fuel-ups

  Property of jtparton

• 37.0 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 2.0L L4 GAS Automatic 9 Speed
  Added Jun 2018 • 41 Fuel-ups

  Property of Acc2017

• 25.2 Avg MPG

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