Based on data from 221 vehicles, 23,930 fuel-ups and 6,961,565 miles of driving, the 2015 GMC Sierra 1500 gets a combined Avg MPG of 15.75 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (14) 5.3L V8 FLEX (50) 5.3L V8 GAS (115) 6.2L V8 GAS (41) Any Body Style Extended Cab Pickup (24) Crew Cab Pickup (68) Any Submodel Base (14) Denali (35) SLE (67) SLT (104) Other (1)

Below you can see a distribution of the fuel-ups with 1536 outliers (6.03%) removed.

Following shows the average MPG of each of the 221 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• »

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 394 Fuel-ups

  Property of dustin8201

• 14.5 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2019 • 376 Fuel-ups

  Property of CaptAbrahamSmollett

• 15.2 Avg MPG

• Sierra Z-71

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 344 Fuel-ups

  Property of acmurf1

• 17.1 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2023 • 85 Fuel-ups

  Property of kblunt

• 15.7 Avg MPG

• Gmc

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 312 Fuel-ups

  Property of StanIROCZ

• 16.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2023 • 88 Fuel-ups

  Property of Hetelle

• 15.3 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • 500 Fuel-ups

  Property of Karels

• 16.8 Avg MPG

• Denali

  2015 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 6 Speed
  Added May 2020 • 124 Fuel-ups

  Property of richardmnagle

• 10.4 Avg MPG

• GMC Sierra Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Aug 2016 • 430 Fuel-ups

  Property of mnetland

• 18.5 Avg MPG

• BlueFishDogTooth III

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added May 2019 • 218 Fuel-ups

  Property of dennisp2938

• 13.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2025 • 3 Fuel-ups

  Property of 435hornhunter

• 15.6 Avg MPG

• Team Blue (Truck)

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Jan 2022 • 222 Fuel-ups

  Property of TeamBlue

• 15.3 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2023 • 128 Fuel-ups

  Property of Nholley

• 17.7 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 121 Fuel-ups

  Property of kyleiowa

• 16.0 Avg MPG

• Silver Surfer

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Apr 2016 • 402 Fuel-ups

  Property of humenfly

• 17.4 Avg MPG

• GMC 1500 SLT

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2019 • 250 Fuel-ups

  Property of slatejoh

• 14.4 Avg MPG

• Joey's GMC

  2015 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
  Added Sep 2016 • 285 Fuel-ups

  Property of Shakora

• 13.9 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic Crew Cab Pickup
  Added Dec 2024 • 605 Fuel-ups

  Property of FLDawg

• 15.2 Avg MPG

• My GMC 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Jun 2017 • 304 Fuel-ups

  Property of bjsgasdata

• 16.1 Avg MPG

• 2015 GMC Sierra 1500 SLT

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 354 Fuel-ups

  Property of mnvik28

• 14.5 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• »