Based on data from 258 vehicles, 25,700 fuel-ups and 7,725,489 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 (20) SLE (93) SLT (94) Other (36)

Below you can see a distribution of the fuel-ups with 1155 outliers (4.30%) removed.

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

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• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 56 Fuel-ups

  Property of DLoewen

• 14.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2025 • 5 Fuel-ups

  Property of Notsew96

• 13.5 Avg MPG

• Sierra 1500 - 2014

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 208 Fuel-ups

  Property of SGwyn

• 14.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 287 Fuel-ups

  Property of Gott42

• 14.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 208 Fuel-ups

  Property of Don31980

• 14.2 Avg MPG

• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 230 Fuel-ups

  Property of coreyrink

• 16.9 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 430 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• 2014 GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 357 Fuel-ups

  Property of kwautosales

• 13.6 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1148 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 210 Fuel-ups

  Property of SallySilverado

• 16.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 95 Fuel-ups

  Property of dkelly9

• 16.6 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2025 • 319 Fuel-ups

  Property of Mthompson

• 14.3 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 248 Fuel-ups

  Property of JoynerFuel

• 16.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 448 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 219 Fuel-ups

  Property of hoffman720

• 13.7 Avg MPG

• My Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2024 • 17 Fuel-ups

  Property of JaceTheMNMan

• 15.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Feb 2024 • 23 Fuel-ups

  Property of Bward7

• 13.7 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 352 Fuel-ups

  Property of Bassbuster88

• 15.1 Avg MPG

• George

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 411 Fuel-ups

  Property of GeorgeParker

• 19.7 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2024 • 33 Fuel-ups

  Property of kejw

• 13.1 Avg MPG

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