Based on data from 254 vehicles, 24,003 fuel-ups and 7,212,290 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 (168) 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 (48) Cab & Chassis - Crew Cab (2) Any Submodel Base (15) Denali (19) SLE (92) SLT (92) Other (36)

Below you can see a distribution of the fuel-ups with 1100 outliers (4.38%) removed.

Following shows the average MPG of each of the 254 vehicles in the system.

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• 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

• 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

• 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

• Sierra/Iridium

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2018 • 26 Fuel-ups

  Property of jendr

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Nov 2017 • 87 Fuel-ups

  Property of clarkpgh

• 15.6 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Jan 2019 • 21 Fuel-ups

  Property of foordd

• 17.8 Avg MPG

• GMC Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 208 Fuel-ups

  Property of jgd1977

• 18.8 Avg MPG

• Dale

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added May 2018 • 192 Fuel-ups

  Property of anousackns

• 15.3 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 274 Fuel-ups

  Property of jlacy2

• 15.5 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed Standard Cab Pickup
  Added Dec 2016 • 14 Fuel-ups

  Property of nuutron

• 18.4 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2016 • 87 Fuel-ups

  Property of tsduke

• 16.5 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2015 • 65 Fuel-ups

  Property of tdi45

• 15.7 Avg MPG

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