Based on data from 239 vehicles, 21,503 fuel-ups and 6,454,431 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.71 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (18) 5.3L V8 FLEX (158) 6.2L V8 GAS (22) GAS (2) V6 GAS (6) V8 GAS (25) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (14) Crew Cab Pickup (45) Cab & Chassis - Crew Cab (1) Any Submodel Base (12) Denali (16) SLT (86) SLE (88) Other (37)

Below you can see a distribution of the fuel-ups with 444 outliers (2.02%) 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 2018 • 215 Fuel-ups

  Property of jmb23802

• 16.2 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 • 205 Fuel-ups

  Property of DanielAcosta

• 19.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 30 Fuel-ups

  Property of dkelly9

• 16.7 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 124 Fuel-ups

  Property of SallySilverado

• 16.4 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • 359 Fuel-ups

  Property of gregorybillyj

• 15.1 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 911 Fuel-ups

  Property of shuckeba

• 11.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2020 • 117 Fuel-ups

  Property of mlsthmpsn

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2021 • 29 Fuel-ups

  Property of jeffstruck

• 11.0 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 248 Fuel-ups

  Property of corvettec5dave

• 17.8 Avg MPG

• Gmc Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 238 Fuel-ups

  Property of blazer6596

• 16.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 151 Fuel-ups

  Property of Gott42

• 15.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Nov 2017 • 184 Fuel-ups

  Property of xlocdnguyen

• 14.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 409 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2014 • 250 Fuel-ups

  Property of Odoyl

• 17.0 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 253 Fuel-ups

  Property of azninc13

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 63 Fuel-ups

  Property of Srebel92

• 13.5 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 131 Fuel-ups

  Property of hoffman720

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2021 • 58 Fuel-ups

  Property of Mdunbar1994

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 354 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 241 Fuel-ups

  Property of kwautosales

• 14.1 Avg MPG

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