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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• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jul 2022 • No Fuel-ups

  Property of Briggsian

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2022 • No Fuel-ups

  Property of pjay81

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2015 • No Fuel-ups

  Property of eean1975

• 0.0 Avg MPG

• Matt

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • No Fuel-ups

  Property of unknown43

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2018 • No Fuel-ups

  Property of Poorboyz

• 0.0 Avg MPG

• The Monster

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2015 • No Fuel-ups

  Property of WALLIEDIRT

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2017 • No Fuel-ups

  Property of pcampb1193

• 0.0 Avg MPG

• Blackie

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 5 Speed Crew Cab Pickup
  Added Feb 2016 • No Fuel-ups

  Property of Faafaa

• 0.0 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2016 • No Fuel-ups

  Property of kmcloutier

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • No Fuel-ups

  Property of speed4tu

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • No Fuel-ups

  Property of theiser22

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2016 • No Fuel-ups

  Property of wolf_diva

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2016 • No Fuel-ups

  Property of bradikal

• 0.0 Avg MPG

• Gmc Denali

  2014 GMC Sierra 1500 Denali 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • No Fuel-ups

  Property of Jeff3673

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2022 • No Fuel-ups

  Property of kennedy41

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2024 • No Fuel-ups

  Property of nolananderson

• 0.0 Avg MPG

• Black Widow

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Feb 2017 • No Fuel-ups

  Property of brotharon

• 0.0 Avg MPG

• Pickup

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX
  Added Aug 2017 • No Fuel-ups

  Property of dparkhurst

• 0.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 GAS V8
  Added Jan 2014 • No Fuel-ups

  Property of C6Doberman

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • No Fuel-ups

  Property of MSIcrazy

• 0.0 Avg MPG

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