Based on data from 367 vehicles, 23,895 fuel-ups and 7,150,588 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 (26) 5.3L V8 FLEX (245) 6.2L V8 GAS (30) GAS (4) V6 GAS (6) V8 GAS (39) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (21) Crew Cab Pickup (60) Cab & Chassis - Crew Cab (2) Cab & Chassis - Extended Cab (1) Any Submodel Base (19) Denali (25) SLE (133) SLT (133) Other (57)

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 367 vehicles in the system.

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• 14 Sierra

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

  Property of vortec42

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 33 Fuel-ups

  Property of jp82

• 12.9 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 169 Fuel-ups

  Property of zuburger

• 12.5 Avg MPG

• 2014 Denali

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed
  Added May 2018 • 36 Fuel-ups

  Property of 2003-SSEi

• 12.9 Avg MPG

• Tilsen GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 596 Fuel-ups

  Property of astaver

• 16.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2016 • 136 Fuel-ups

  Property of plumbrokeacres

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 129 Fuel-ups

  Property of rj21

• 12.4 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2019 • 46 Fuel-ups

  Property of fuss310

• 18.0 Avg MPG

• GMC Sierra SLE

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 140 Fuel-ups

  Property of kellswo

• 16.4 Avg MPG

• 2014 Sierra 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Feb 2014 • 189 Fuel-ups

  Property of TXRanger

• 16.1 Avg MPG

• Clifford 5.0

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Dec 2013 • 159 Fuel-ups

  Property of papcie03

• 16.8 Avg MPG

• My New Sierra

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 409 Fuel-ups

  Property of RB76

• 16.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • 38 Fuel-ups

  Property of Unionrep

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2017 • 127 Fuel-ups

  Property of jhjd

• 16.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Nov 2019 • 9 Fuel-ups

  Property of JLYRGR7

• 14.6 Avg MPG

• Jess's Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Nov 2019 • No Fuel-ups

  Property of ornwilson

• 0.0 Avg MPG

• Wake Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Mar 2019 • 82 Fuel-ups

  Property of COMWake

• 15.6 Avg MPG

• MC4A

  2014 GMC Sierra 1500
  Added Nov 2019 • No Fuel-ups

  Property of Meconcrete1

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2018 • 2 Fuel-ups

  Property of knakg

• 13.4 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2018 • 60 Fuel-ups

  Property of dsc0814

• 16.2 Avg MPG

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