Based on data from 249 vehicles, 23,838 fuel-ups and 7,133,687 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 496 outliers (2.04%) removed.

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

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• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 124 Fuel-ups

  Property of LWConrad

• 15.5 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2022 • 69 Fuel-ups

  Property of bigjamz

• 13.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 181 Fuel-ups

  Property of SallySilverado

• 16.5 Avg MPG

• Blue Duce

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 417 Fuel-ups

  Property of drink2006

• 13.8 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 363 Fuel-ups

  Property of azninc13

• 15.3 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 49 Fuel-ups

  Property of jamesg88

• 17.8 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 262 Fuel-ups

  Property of jayner86

• 11.4 Avg MPG

• All Terrain CC 5.3

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 231 Fuel-ups

  Property of Evan48

• 16.9 Avg MPG

• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 148 Fuel-ups

  Property of srquill

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 74 Fuel-ups

  Property of onEsierra

• 14.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 28 Fuel-ups

  Property of DLoewen

• 14.3 Avg MPG

• Giannina

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2020 • 146 Fuel-ups

  Property of Afterlife

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 78 Fuel-ups

  Property of dkelly9

• 16.6 Avg MPG

• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 81 Fuel-ups

  Property of Sasquatchewan

• 15.4 Avg MPG

• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 205 Fuel-ups

  Property of coreyrink

• 17.0 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 315 Fuel-ups

  Property of corvettec5dave

• 17.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 215 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2024 • 3 Fuel-ups

  Property of kejw

• 13.0 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 46 Fuel-ups

  Property of rwetzeler

• 12.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added May 2022 • 15 Fuel-ups

  Property of livewyre13

• 11.7 Avg MPG

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