Based on data from 258 vehicles, 25,661 fuel-ups and 7,714,053 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 (20) 5.3L V8 FLEX (171) 6.2L V8 GAS (26) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (18) Crew Cab Pickup (49) Cab & Chassis - Crew Cab (2) Any Submodel Base (15) Denali (19) SLE (93) SLT (95) Other (36)

Below you can see a distribution of the fuel-ups with 1149 outliers (4.29%) removed.

Following shows the average MPG of each of the 258 vehicles in the system.

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• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1142 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• George

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 405 Fuel-ups

  Property of GeorgeParker

• 19.7 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 71 Fuel-ups

  Property of rwetzeler

• 12.8 Avg MPG

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 140 Fuel-ups

  Property of pcotto87

• 15.8 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 217 Fuel-ups

  Property of hoffman720

• 13.8 Avg MPG

• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 227 Fuel-ups

  Property of coreyrink

• 16.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 281 Fuel-ups

  Property of Gott42

• 14.8 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 246 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 385 Fuel-ups

  Property of azninc13

• 15.4 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 SLE Automatic 6 Speed Crew Cab Pickup
  Added Aug 2024 • 12 Fuel-ups

  Property of kevinbogle1278

• 16.3 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 209 Fuel-ups

  Property of SallySilverado

• 16.5 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 350 Fuel-ups

  Property of Bassbuster88

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 204 Fuel-ups

  Property of Don31980

• 14.2 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 427 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2025 • 315 Fuel-ups

  Property of Mthompson

• 14.3 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 484 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 300 Fuel-ups

  Property of jayner86

• 11.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 212 Fuel-ups

  Property of Vrooom7979

• 14.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 53 Fuel-ups

  Property of DLoewen

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 445 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

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