Based on data from 207 vehicles, 20,328 fuel-ups and 5,953,886 miles of driving, the 2015 GMC Sierra 1500 gets a combined Avg MPG of 15.78 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (13) 5.3L V8 FLEX (45) 5.3L V8 GAS (104) 6.2L V8 GAS (41) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (24) Crew Cab Pickup (65) Any Submodel Base (14) Denali (36) SLE (60) SLT (93) Other (4)

Below you can see a distribution of the fuel-ups with 611 outliers (2.92%) removed.

Following shows the average MPG of each of the 207 vehicles in the system.

• «
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• »

• GMC Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2020 • 68 Fuel-ups

  Property of Chuck16785

• 17.2 Avg MPG

• BlueFishDogTooth III

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added May 2019 • 98 Fuel-ups

  Property of dennisp2938

• 12.6 Avg MPG

• GMC Sierra Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Aug 2016 • 307 Fuel-ups

  Property of mnetland

• 18.6 Avg MPG

• Sierra All Terrain

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jul 2015 • 189 Fuel-ups

  Property of Gilles

• 17.4 Avg MPG

• Ali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2021 • 19 Fuel-ups

  Property of WPro

• 16.5 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Nov 2019 • 66 Fuel-ups

  Property of Musang

• 15.1 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 23 Fuel-ups

  Property of kyleiowa

• 15.9 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2016 • 239 Fuel-ups

  Property of Mike1ch

• 13.1 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 6 Speed
  Added May 2018 • 57 Fuel-ups

  Property of arcasey1989

• 14.2 Avg MPG

• GMC Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2015 • 408 Fuel-ups

  Property of Arctic388

• 16.4 Avg MPG

• Black Truck

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 355 Fuel-ups

  Property of Dukesask

• 14.8 Avg MPG

• GMC Sierra

  2015 GMC Sierra 1500 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2021 • 12 Fuel-ups

  Property of macbot2000

• 12.2 Avg MPG

• 2015 GMC SIERRA CREW CAB

  2015 GMC Sierra 1500 SLT 6.2L GAS V8 Automatic 8 Crew Cab Pickup (4 Door)
  Added May 2015 • 137 Fuel-ups

  Property of Freeweeling

• 18.4 Avg MPG

• Alex's GMC

  2015 GMC Sierra 1500
  Added Mar 2022 • 8 Fuel-ups

  Property of COM-Mattawa

• 16.0 Avg MPG

• 2015 GMC SIERRA CREW CAB TOWING

  2015 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Jun 2015 • 57 Fuel-ups

  Property of Freeweeling

• 14.1 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 223 Fuel-ups

  Property of akrutzler

• 15.5 Avg MPG

• GMC Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jul 2020 • 23 Fuel-ups

  Property of KeeBlitz

• 18.7 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2015 • 85 Fuel-ups

  Property of Clemsonfan15

• 16.1 Avg MPG

• Denali

  2015 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 6 Speed
  Added May 2020 • 55 Fuel-ups

  Property of richardmnagle

• 10.7 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2020 • 20 Fuel-ups

  Property of Selway

• 17.2 Avg MPG

• «
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• »