Based on data from 57 vehicles, 4,084 fuel-ups and 1,205,676 miles of driving, the 2015 GMC Terrain gets a combined Avg MPG of 21.20 with a 0.12 MPG margin of error.

Any Engine Type 2.4L L4 FLEX (10) 2.4L L4 GAS (28) 3.6L V6 FLEX (2) 3.6L V6 GAS (14) Any Body Style Sedan (1) Sport Utility (12) Any Submodel SL (3) Denali (4) SLT (15) SLE (35)

Below you can see a distribution of the fuel-ups with 96 outliers (2.30%) removed.

Following shows the average MPG of each of the 57 vehicles in the system.

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• Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Jan 2017 • 6 Fuel-ups

  Property of georgewbeach

• 20.9 Avg MPG

• GMC Terrain 2015

  2015 GMC Terrain Denali Automatic 6 Speed Sport Utility
  Added Oct 2017 • 60 Fuel-ups

  Property of 2Rotars

• 17.6 Avg MPG

• Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS
  Added Jul 2016 • 9 Fuel-ups

  Property of Thetucks

• 27.2 Avg MPG

• Jay Prosser

  2015 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Sep 2016 • 39 Fuel-ups

  Property of Jay43

• 21.2 Avg MPG

• MOMMAS NEW NEW RIDE

  2015 GMC Terrain Denali 3.6L GAS V6 Automatic 6 Sport Utility (4 Door)
  Added May 2015 • 20 Fuel-ups

  Property of FORMERCMAXOWNER

• 17.1 Avg MPG

• Marsha

  2015 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed
  Added Feb 2016 • 5 Fuel-ups

  Property of GMCTERRAIN

• 39.7 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Jan 2016 • 14 Fuel-ups

  Property of Jasso92

• 23.7 Avg MPG

• terrainitup

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Dec 2014 • 37 Fuel-ups

  Property of blizazer

• 20.6 Avg MPG

• GMC TERRAIN

  2015 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Feb 2016 • 7 Fuel-ups

  Property of lisac

• 22.0 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Oct 2015 • 51 Fuel-ups

  Property of texasauditor

• 24.6 Avg MPG

• The Train

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jun 2015 • 12 Fuel-ups

  Property of mreed1491

• 21.7 Avg MPG

• Midnight

  2015 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Sport Utility (4 Door)
  Added Jan 2015 • 17 Fuel-ups

  Property of zipppy

• 21.6 Avg MPG

• GMC Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Sport Utility (4 Door)
  Added May 2015 • 5 Fuel-ups

  Property of garth285

• 23.0 Avg MPG

• TERRAIN WITH 4x8 UHAUL TRAILER

  2015 GMC Terrain SLE 2.4L GAS L4 Automatic 6 Sport Utility (4 Door)
  Added Jun 2015 • 8 Fuel-ups

  Property of garth285

• 20.9 Avg MPG

• Terrain 15

  2015 GMC Terrain SLE 2.4L FLEX L4 Automatic 6 Sport Utility (4 Door)
  Added Jun 2015 • 5 Fuel-ups

  Property of bazmia94

• 26.4 Avg MPG

• Baby Gas Guzzler

  2015 GMC Terrain SLE 2.4L GAS L4 Automatic 6 Sport Utility (4 Door)
  Added Dec 2014 • 3 Fuel-ups

  Property of HybridFoSho

• 23.7 Avg MPG

• Dodge Caliber 2009

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2016 • 234 Fuel-ups

  Property of dbwoot10

• 25.0 Avg MPG

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