Based on data from 79 vehicles, 6,846 fuel-ups and 2,257,908 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 1.6L L4 DIESEL Automatic 6 Speed
  Added Feb 2024 • 77 Fuel-ups

  Property of Stevesgas

• 35.7 Avg MPG

• Dezzy

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed Sport Utility
  Added Jun 2018 • 38 Fuel-ups

  Property of moyerdm

• 24.4 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Sep 2018 • 30 Fuel-ups

  Property of mishiemar

• 26.0 Avg MPG

• Terrain Diesel

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Sep 2019 • 16 Fuel-ups

  Property of mobo44

• 37.4 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Sep 2018 • 5 Fuel-ups

  Property of itsjustjae

• 46.5 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 1.6L L4 DIESEL Automatic 6 Speed
  Added Feb 2018 • 61 Fuel-ups

  Property of brewbhr

• 34.3 Avg MPG

• My Terrain

  2018 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added May 2018 • 42 Fuel-ups

  Property of gabymv

• 22.7 Avg MPG

• GMC Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Nov 2018 • 8 Fuel-ups

  Property of zoiguy

• 25.1 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 6 Speed
  Added Mar 2018 • 37 Fuel-ups

  Property of keylimegirl

• 32.6 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Nov 2017 • 56 Fuel-ups

  Property of wkdubberke

• 22.8 Avg MPG

• Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 6 Speed
  Added Jun 2018 • 19 Fuel-ups

  Property of jrimel

• 25.3 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.6L L4 DIESEL Automatic 9 Speed
  Added Jun 2018 • 33 Fuel-ups

  Property of Meadors

• 35.6 Avg MPG

• Terrain

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Apr 2018 • 34 Fuel-ups

  Property of BernieL

• 25.2 Avg MPG

• 2018 Blue Terrain

  2018 GMC Terrain SLE Sport Utility
  Added Jun 2018 • 17 Fuel-ups

  Property of Amillermba

• 26.0 Avg MPG

• Terrain SLT

  2018 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Mar 2018 • 10 Fuel-ups

  Property of rwatters

• 25.6 Avg MPG

• GMC

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Jan 2018 • 10 Fuel-ups

  Property of thejuanandonly235

• 20.6 Avg MPG

• My Terrain

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Jan 2018 • 6 Fuel-ups

  Property of pgwill

• 27.5 Avg MPG

• Tia M Shubin

  2018 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Dec 2017 • 5 Fuel-ups

  Property of Tiamariestuff

• 25.2 Avg MPG

• My Terrain

  2018 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Nov 2017 • 3 Fuel-ups

  Property of idost2012

• 26.4 Avg MPG

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