Based on data from 51 vehicles, 3,069 fuel-ups and 924,646 miles of driving, the 2015 GMC Terrain gets a combined Avg MPG of 21.47 with a 0.13 MPG margin of error.

Any Engine Type 2.4L L4 FLEX (9) 2.4L L4 GAS (26) 3.6L V6 FLEX (2) 3.6L V6 GAS (10) Any Body Style Sedan (1) Sport Utility (12) Any Submodel SL (3) Denali (4) SLT (12) SLE (32)

Below you can see a distribution of the fuel-ups with 86 outliers (2.73%) removed.

Following shows the average MPG of each of the 51 vehicles in the system.

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• Terrain

  2015 GMC Terrain SLT 2.4L L4 FLEX Automatic 6 Speed
  Added Dec 2015 • 240 Fuel-ups

  Property of rgill429

• 18.3 Avg MPG

• Kelsey's Baby Truck 2.0

  2015 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed
  Added May 2017 • 233 Fuel-ups

  Property of Kaszmann

• 22.1 Avg MPG

• Red

  2015 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed
  Added Mar 2018 • 72 Fuel-ups

  Property of mouldman

• 23.2 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Jul 2018 • 142 Fuel-ups

  Property of MelMurtle

• 23.6 Avg MPG

• Terrain

  2015 GMC Terrain Denali 3.6L V6 FLEX Automatic 6 Speed Sport Utility
  Added Dec 2018 • 407 Fuel-ups

  Property of jdebner

• 21.4 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2020 • 9 Fuel-ups

  Property of keyates629

• 23.4 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Aug 2019 • 45 Fuel-ups

  Property of TMO65

• 19.5 Avg MPG

• Silver Sky

  2015 GMC Terrain SL 2.4L L4 GAS Automatic 5 Speed Sport Utility
  Added May 2015 • 114 Fuel-ups

  Property of Lonestar4X4

• 22.4 Avg MPG

• Terrain

  2015 GMC Terrain SLT 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added May 2018 • 72 Fuel-ups

  Property of Rsdevine

• 23.6 Avg MPG

• Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed Sport Utility
  Added Jan 2019 • 29 Fuel-ups

  Property of h46crewchf

• 38.4 Avg MPG

• GMC Terrain

  2015 GMC Terrain SLE 2.4L L4 FLEX Automatic 6 Speed
  Added Jul 2017 • 197 Fuel-ups

  Property of rickwhaas

• 22.4 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Mar 2017 • 14 Fuel-ups

  Property of mgoblue94

• 61.1 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 3.6L V6 FLEX Automatic 6 Speed
  Added Dec 2019 • 9 Fuel-ups

  Property of marcvanpoperin

• 19.2 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Nov 2019 • 15 Fuel-ups

  Property of stevenb924

• 21.2 Avg MPG

• Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2018 • 126 Fuel-ups

  Property of Adrian225

• 26.2 Avg MPG

• Thing

  2015 GMC Terrain SLE 3.6L V6 GAS Automatic 6 Speed
  Added Aug 2019 • 26 Fuel-ups

  Property of dragon05452

• 18.3 Avg MPG

• Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2016 • 319 Fuel-ups

  Property of dbwoot10

• 22.9 Avg MPG

• My Terrain

  2015 GMC Terrain SLT 3.6L V6 GAS Automatic 6 Speed
  Added Sep 2017 • 46 Fuel-ups

  Property of Patriots

• 32.9 Avg MPG

• Gmc

  2015 GMC Terrain SLE Automatic 6 Speed Sport Utility
  Added Jul 2019 • 7 Fuel-ups

  Property of smitty870

• 24.2 Avg MPG

• My Terrain

  2015 GMC Terrain SLE 2.4L L4 GAS Automatic 6 Speed
  Added May 2018 • 42 Fuel-ups

  Property of keyates

• 23.0 Avg MPG

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