Based on data from 31 vehicles, 2,731 fuel-ups and 868,110 miles of driving, the 2014 GMC Sierra 2500 HD gets a combined Avg MPG of 12.71 with a 0.14 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (4) 6.0L V8 GAS (4) 6.6L V8 DIESEL (22) GAS (1) Any Body Style Crew Cab Pickup (9) Any Submodel WT (4) SLT (6) SLE (10) Denali (10) Other (1)

Below you can see a distribution of the fuel-ups with 24 outliers (0.87%) removed.

Following shows the average MPG of each of the 31 vehicles in the system.

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• Gmc

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2018 • 333 Fuel-ups

  Property of lime4x4

• 12.8 Avg MPG

• 2 - My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2018 • 364 Fuel-ups

  Property of journeyfan91

• 13.1 Avg MPG

• 2014 GMC Denali 2500 HD

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2016 • 122 Fuel-ups

  Property of phillyturbosix

• 14.1 Avg MPG

• Work truck

  2014 GMC Sierra 2500 HD SLE 6.0L V8 FLEX Automatic 6 Speed
  Added Sep 2022 • 67 Fuel-ups

  Property of cdizzle

• 9.9 Avg MPG

• Duramax

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2021 • 166 Fuel-ups

  Property of Hawk06

• 13.9 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2023 • 30 Fuel-ups

  Property of firemans_hero

• 15.2 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2022 • 64 Fuel-ups

  Property of mduester

• 11.6 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2020 • 89 Fuel-ups

  Property of bachelor_jr

• 12.9 Avg MPG

• Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2018 • 111 Fuel-ups

  Property of belkster907

• 15.3 Avg MPG

• GMC Sierra 2500HD Denali

  2014 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Sep 2023 • 82 Fuel-ups

  Property of girk

• 12.7 Avg MPG

• Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.0L V8 FLEX Automatic 6 Speed
  Added Jun 2015 • 214 Fuel-ups

  Property of mrxaero

• 10.6 Avg MPG

• Sierra 2500HD

  2014 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 153 Fuel-ups

  Property of wsprsvp

• 12.5 Avg MPG

• GMC

  2014 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Dec 2020 • 136 Fuel-ups

  Property of boyerb83

• 14.3 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2017 • 257 Fuel-ups

  Property of RandD

• 14.0 Avg MPG

• Work Truck 2015

  2014 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 6 Speed
  Added Dec 2019 • 173 Fuel-ups

  Property of 94XJ

• 8.5 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2021 • 6 Fuel-ups

  Property of shanecrowell

• 9.9 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2018 • 76 Fuel-ups

  Property of rzrscubasteve03

• 14.4 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2020 • 18 Fuel-ups

  Property of Nibs674

• 13.0 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2017 • 82 Fuel-ups

  Property of blackduramax1

• 13.6 Avg MPG

• My Sierra 2500 HD

  2014 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2019 • 9 Fuel-ups

  Property of Nibs674

• 13.7 Avg MPG

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