Based on data from 249 vehicles, 23,499 fuel-ups and 7,021,830 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.65 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (166) 6.2L V8 GAS (24) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (15) Crew Cab Pickup (48) Cab & Chassis - Crew Cab (2) Any Submodel Base (13) Denali (18) SLT (88) SLE (94) Other (36)

Below you can see a distribution of the fuel-ups with 492 outliers (2.05%) 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 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 299 Fuel-ups

  Property of blazer6596

• 16.6 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 429 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 539 Fuel-ups

  Property of Larry942

• 15.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 163 Fuel-ups

  Property of SallySilverado

• 16.6 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2017 • 270 Fuel-ups

  Property of Charcoachevy

• 12.0 Avg MPG

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 106 Fuel-ups

  Property of pcotto87

• 15.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 281 Fuel-ups

  Property of bnlitton

• 15.6 Avg MPG

• 2014 Sierra Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2018 • 132 Fuel-ups

  Property of smokinu454

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2021 • 118 Fuel-ups

  Property of Buildmorediesels

• 16.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 127 Fuel-ups

  Property of Don31980

• 14.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 196 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 246 Fuel-ups

  Property of jayner86

• 11.5 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Oct 2022 • 60 Fuel-ups

  Property of COM-Mattawa

• 14.1 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1012 Fuel-ups

  Property of shuckeba

• 11.0 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 32 Fuel-ups

  Property of jamesg88

• 18.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 190 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Nov 2019 • 146 Fuel-ups

  Property of Bluecoma

• 17.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 291 Fuel-ups

  Property of cbass25

• 13.4 Avg MPG

• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 80 Fuel-ups

  Property of Sasquatchewan

• 15.4 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 443 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

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