Based on data from 36 vehicles, 2,927 fuel-ups and 780,886 miles of driving, the 2020 GMC Terrain gets a combined Avg MPG of 24.26 with a 0.16 MPG margin of error.

Any Engine Type 1.5L L4 GAS (20) 2.0L L4 GAS (13) Any Body Style Sport Utility (14) Any Submodel Denali (5) SLE (10) SLT (21)

Below you can see a distribution of the fuel-ups with 52 outliers (1.75%) removed.

Following shows the average MPG of each of the 36 vehicles in the system.

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• My Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2020 • 265 Fuel-ups

  Property of plonker2008

• 23.0 Avg MPG

• Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Sep 2020 • 137 Fuel-ups

  Property of Glock32

• 22.3 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Jun 2022 • 45 Fuel-ups

  Property of ansberto85

• 21.3 Avg MPG

• 2020 Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Aug 2020 • 123 Fuel-ups

  Property of ashleymouton

• 24.8 Avg MPG

• Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Nov 2020 • 134 Fuel-ups

  Property of Daishi

• 26.3 Avg MPG

• Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Nov 2024 • 134 Fuel-ups

  Property of Daishi

• 26.3 Avg MPG

• My Terrain

  2020 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Sep 2020 • 58 Fuel-ups

  Property of mjh007

• 25.1 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Dec 2020 • 52 Fuel-ups

  Property of koolkev

• 19.3 Avg MPG

• Rudy’s Terrain

  2020 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed
  Added Aug 2021 • 16 Fuel-ups

  Property of merv3907

• 26.6 Avg MPG

• Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jun 2020 • 44 Fuel-ups

  Property of Messiah66

• 32.0 Avg MPG

• Elsa

  2020 GMC Terrain Denali 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Nov 2020 • 4 Fuel-ups

  Property of 92teg92

• 18.7 Avg MPG

• My Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Oct 2020 • 5 Fuel-ups

  Property of Ewiggie

• 39.6 Avg MPG

• My Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Aug 2020 • 10 Fuel-ups

  Property of swampybottom

• 29.1 Avg MPG

• Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Mar 2020 • 7 Fuel-ups

  Property of dvisger

• 30.9 Avg MPG

• 20 GMC Terrain SLT

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Jan 2020 • 19 Fuel-ups

  Property of Ronofa

• 23.2 Avg MPG

• My Terrain

  2020 GMC Terrain SLE
  Added Dec 2019 • 11 Fuel-ups

  Property of ayzeya

• 27.4 Avg MPG

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