Based on data from 30 vehicles, 2,462 fuel-ups and 650,824 miles of driving, the 2020 GMC Terrain gets a combined Avg MPG of 23.92 with a 0.17 MPG margin of error.

Any Engine Type 1.5L L4 GAS (16) 2.0L L4 GAS (11) Any Body Style Sport Utility (12) Any Submodel Denali (4) SLE (8) SLT (18)

Below you can see a distribution of the fuel-ups with 47 outliers (1.87%) removed.

Following shows the average MPG of each of the 30 vehicles in the system.

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• My Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Jun 2020 • 141 Fuel-ups

  Property of phillyturbosix

• 24.9 Avg MPG

• 2020 Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Sep 2020 • 103 Fuel-ups

  Property of Wrench01

• 27.6 Avg MPG

• 2020 GMC Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jul 2020 • 217 Fuel-ups

  Property of fredgannon

• 25.1 Avg MPG

• 2020 Terrain

  2020 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed
  Added Jun 2021 • 171 Fuel-ups

  Property of bjames69firebird

• 26.4 Avg MPG

• Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Feb 2020 • 116 Fuel-ups

  Property of dmarbes

• 26.4 Avg MPG

• GMC Terrain SLT

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Nov 2020 • 267 Fuel-ups

  Property of Arik74

• 22.0 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Aug 2020 • 101 Fuel-ups

  Property of JessicaMarie

• 20.3 Avg MPG

• 2020 GMC Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Apr 2021 • 111 Fuel-ups

  Property of dlav_ca

• 22.9 Avg MPG

• Terrain

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

  Property of jones715

• 20.2 Avg MPG

• My Terrain

  2020 GMC Terrain SLT
  Added Jan 2020 • 52 Fuel-ups

  Property of wrjsn

• 24.4 Avg MPG

• Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Oct 2021 • 18 Fuel-ups

  Property of slugro

• 23.8 Avg MPG

• GMC Terrain

  2020 GMC Terrain SLE Automatic 9 Speed Sport Utility
  Added Jul 2020 • 91 Fuel-ups

  Property of lizhbunce

• 27.5 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Mar 2020 • 131 Fuel-ups

  Property of trains2007

• 25.4 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 2.0L L4 GAS Automatic 9 Speed
  Added Apr 2021 • 96 Fuel-ups

  Property of alialsa

• 19.1 Avg MPG

• My Terrain

  2020 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Mar 2021 • 107 Fuel-ups

  Property of sunnykub

• 29.0 Avg MPG

• 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

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