Based on data from 17 vehicles, 851 fuel-ups and 238,624 miles of driving, the 2023 GMC Terrain gets a combined Avg MPG of 25.70 with a 0.32 MPG margin of error.

Any Engine Type 1.5L L4 GAS (13) H4 GAS (1) Any Body Style Sport Utility (4) Any Submodel SLE (3) AT4 (3) SLT (5) Denali (6)

Below you can see a distribution of the fuel-ups with 47 outliers (5.23%) removed.

Following shows the average MPG of each of the 17 vehicles in the system.

• My Terrain

  2023 GMC Terrain Denali 1.5L L4 GAS Automatic 9 Speed
  Added Sep 2023 • 158 Fuel-ups

  Property of marsmit714

• 26.7 Avg MPG

• My Terrain

  2023 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Dec 2023 • 42 Fuel-ups

  Property of Dons09Lincoln

• 23.0 Avg MPG

• Jenn's New Car

  2023 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jul 2023 • 132 Fuel-ups

  Property of partylitebyjennifer

• 27.8 Avg MPG

• GMC Terrain

  2023 GMC Terrain Denali H4 GAS
  Added Dec 2024 • 64 Fuel-ups

  Property of juanwall

• 23.6 Avg MPG

• GMC Terrain All-Wheel Drive

  2023 GMC Terrain AT4 1.5L L4 GAS Automatic 9 Speed
  Added Feb 2024 • 43 Fuel-ups

  Property of RWRTAH

• 25.1 Avg MPG

• My Terrain

  2023 GMC Terrain Denali 1.5L L4 GAS Automatic 9 Speed
  Added May 2024 • 24 Fuel-ups

  Property of jwuite

• 26.3 Avg MPG

• Terrain

  2023 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Apr 2023 • 28 Fuel-ups

  Property of sgarris

• 18.9 Avg MPG

• My Terrain

  2023 GMC Terrain SLE
  Added Mar 2023 • 79 Fuel-ups

  Property of Cyclops29

• 24.9 Avg MPG

• GMC Denali

  2023 GMC Terrain Denali 1.5L L4 GAS Automatic 9 Speed
  Added Aug 2023 • 199 Fuel-ups

  Property of mdcutting

• 32.6 Avg MPG

• Kenna’s Car

  2023 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Jul 2024 • 18 Fuel-ups

  Property of Kennag1226

• 24.3 Avg MPG

• Donna's Terrain

  2023 GMC Terrain Denali 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Mar 2024 • 4 Fuel-ups

  Property of wingbase

• 24.6 Avg MPG

• GMC Terrain

  2023 GMC Terrain AT4 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Jul 2023 • 36 Fuel-ups

  Property of Chrome_Daddy0

• 28.3 Avg MPG

• xGMC Terrain RENTAL Aug 2024

  2023 GMC Terrain SLT 1.5L L4 GAS Automatic 9 Speed
  Added Aug 2024 • 18 Fuel-ups

  Property of adamgh81

• 27.6 Avg MPG

• GMC 081624

  2023 GMC Terrain SLE 1.5L L4 GAS Automatic 9 Speed Sport Utility
  Added Aug 2024 • 4 Fuel-ups

  Property of Purduex2

• 30.0 Avg MPG

• GMC Terrain

  2023 GMC Terrain Denali
  Added Apr 2023 • 70 Fuel-ups

  Property of juanw

• 23.5 Avg MPG

• My Terrain

  2023 GMC Terrain AT4 1.5L L4 GAS Automatic 9 Speed
  Added Jun 2023 • 30 Fuel-ups

  Property of hope_farsdale

• 23.6 Avg MPG

• WHITE SPRITE

  2023 GMC Terrain SLE
  Added Jan 2023 • 23 Fuel-ups

  Property of foxiius

• 19.6 Avg MPG