Based on data from 249 vehicles, 23,880 fuel-ups and 7,145,662 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.62 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (164) 6.2L V8 GAS (26) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (16) Crew Cab Pickup (45) Cab & Chassis - Crew Cab (2) Any Submodel Base (14) Denali (19) SLE (90) SLT (90) Other (36)

Below you can see a distribution of the fuel-ups with 497 outliers (2.04%) removed.

Following shows the average MPG of each of the 249 vehicles in the system.

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• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 241 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 315 Fuel-ups

  Property of cbass25

• 13.4 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 264 Fuel-ups

  Property of jayner86

• 11.4 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Oct 2022 • 85 Fuel-ups

  Property of COM-Mattawa

• 16.5 Avg MPG

• Blue Duce

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 419 Fuel-ups

  Property of drink2006

• 13.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 392 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 114 Fuel-ups

  Property of pcotto87

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 171 Fuel-ups

  Property of SGwyn

• 14.6 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 325 Fuel-ups

  Property of Bassbuster88

• 15.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 453 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 208 Fuel-ups

  Property of coreyrink

• 17.0 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1070 Fuel-ups

  Property of shuckeba

• 11.1 Avg MPG

• Gmc Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 329 Fuel-ups

  Property of blazer6596

• 16.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 309 Fuel-ups

  Property of jmb23802

• 16.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 316 Fuel-ups

  Property of bnlitton

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 75 Fuel-ups

  Property of onEsierra

• 14.3 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 453 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 182 Fuel-ups

  Property of SallySilverado

• 16.5 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 214 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 216 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

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