Based on data from 239 vehicles, 21,695 fuel-ups and 6,506,151 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.70 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (158) 6.2L V8 GAS (22) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (14) Crew Cab Pickup (45) Cab & Chassis - Crew Cab (1) Any Submodel Base (13) Denali (16) SLT (86) SLE (88) Other (36)

Below you can see a distribution of the fuel-ups with 444 outliers (2.01%) removed.

Following shows the average MPG of each of the 239 vehicles in the system.

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• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2021 • 38 Fuel-ups

  Property of jeffstruck

• 11.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Jun 2022 • 6 Fuel-ups

  Property of nwwerdel

• 14.0 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2014 • 252 Fuel-ups

  Property of Odoyl

• 17.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 156 Fuel-ups

  Property of Gott42

• 15.0 Avg MPG

• Gmc Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 242 Fuel-ups

  Property of blazer6596

• 16.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • 367 Fuel-ups

  Property of gregorybillyj

• 15.1 Avg MPG

• Giannina

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2020 • 72 Fuel-ups

  Property of Afterlife

• 14.2 Avg MPG

• 14 Sierra 5.3 4x4

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2019 • 213 Fuel-ups

  Property of DanielAcosta

• 19.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2020 • 123 Fuel-ups

  Property of mlsthmpsn

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Nov 2017 • 189 Fuel-ups

  Property of xlocdnguyen

• 14.2 Avg MPG

• Blue Duce

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 365 Fuel-ups

  Property of drink2006

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 215 Fuel-ups

  Property of bnlitton

• 16.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 111 Fuel-ups

  Property of SGwyn

• 14.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 32 Fuel-ups

  Property of onEsierra

• 13.9 Avg MPG

• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 83 Fuel-ups

  Property of srquill

• 15.3 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2013 • 329 Fuel-ups

  Property of Twylyt

• 18.0 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Nov 2019 • 105 Fuel-ups

  Property of Bluecoma

• 16.8 Avg MPG

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 93 Fuel-ups

  Property of pcotto87

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2021 • 28 Fuel-ups

  Property of gmmartin

• 15.8 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 79 Fuel-ups

  Property of Straussberg

• 16.4 Avg MPG

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