Based on data from 250 vehicles, 23,823 fuel-ups and 7,112,611 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.63 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 (25) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (15) Crew Cab Pickup (47) Cab & Chassis - Crew Cab (2) Any Submodel Base (13) Denali (18) SLT (89) SLE (94) Other (36)

Below you can see a distribution of the fuel-ups with 495 outliers (2.04%) removed.

Following shows the average MPG of each of the 250 vehicles in the system.

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• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 350 Fuel-ups

  Property of azninc13

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 291 Fuel-ups

  Property of jmb23802

• 16.1 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 308 Fuel-ups

  Property of corvettec5dave

• 17.8 Avg MPG

• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 135 Fuel-ups

  Property of srquill

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 220 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• 2014 GMC Sierra SLE

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • 275 Fuel-ups

  Property of Charcoachevy

• 12.0 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2022 • 56 Fuel-ups

  Property of bigjamz

• 14.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 299 Fuel-ups

  Property of cbass25

• 13.4 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 39 Fuel-ups

  Property of jamesg88

• 18.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 65 Fuel-ups

  Property of onEsierra

• 14.3 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 446 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

• Gmc Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 310 Fuel-ups

  Property of blazer6596

• 16.6 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 • 222 Fuel-ups

  Property of Evan48

• 16.9 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1036 Fuel-ups

  Property of shuckeba

• 11.0 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 548 Fuel-ups

  Property of Larry942

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 142 Fuel-ups

  Property of Don31980

• 14.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 401 Fuel-ups

  Property of capnmo

• 14.4 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 170 Fuel-ups

  Property of SallySilverado

• 16.6 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Oct 2022 • 71 Fuel-ups

  Property of COM-Mattawa

• 15.3 Avg MPG

• 2014 GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 339 Fuel-ups

  Property of kwautosales

• 13.6 Avg MPG

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