Based on data from 258 vehicles, 25,700 fuel-ups and 7,724,437 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 1153 outliers (4.29%) 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 Jan 2021 • 126 Fuel-ups

  Property of Buildmorediesels

• 16.3 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Nov 2019 • 151 Fuel-ups

  Property of Bluecoma

• 17.0 Avg MPG

• Jamie

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2023 • 4 Fuel-ups

  Property of speedyjon2829

• 14.8 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2023 • 34 Fuel-ups

  Property of Winpooh

• 16.4 Avg MPG

• GRZLYBR

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 14 Fuel-ups

  Property of MThompsonjr115

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2023 • 12 Fuel-ups

  Property of rgb820

• 11.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2021 • 33 Fuel-ups

  Property of gmmartin

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2023 • 3 Fuel-ups

  Property of derek18105

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Nov 2017 • 234 Fuel-ups

  Property of xlocdnguyen

• 14.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2021 • 101 Fuel-ups

  Property of Mdunbar1994

• 15.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2023 • 37 Fuel-ups

  Property of Kootenayguy

• 14.5 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2020 • 199 Fuel-ups

  Property of mlsthmpsn

• 14.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 80 Fuel-ups

  Property of Srebel92

• 13.7 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 • 247 Fuel-ups

  Property of DanielAcosta

• 19.2 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2022 • 4 Fuel-ups

  Property of COM-Mattawa

• 14.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Jun 2022 • 9 Fuel-ups

  Property of nwwerdel

• 14.0 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed Standard Cab Pickup
  Added Sep 2018 • 206 Fuel-ups

  Property of prixxjohn21

• 15.3 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 81 Fuel-ups

  Property of Straussberg

• 15.5 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2014 • 253 Fuel-ups

  Property of Odoyl

• 17.0 Avg MPG

• 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

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