Based on data from 27 vehicles, 1,766 fuel-ups and 661,838 miles of driving, the 2015 GMC Sierra 3500 HD gets a combined Avg MPG of 14.50 with a 0.21 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (2) 6.0L V8 GAS (1) 6.6L V8 DIESEL (22) DIESEL (1) Any Body Style Crew Cab Pickup (5) Any Submodel Base (1) SLE (4) SLT (4) Denali (17) Other (1)

Below you can see a distribution of the fuel-ups with 22 outliers (1.23%) removed.

Following shows the average MPG of each of the 27 vehicles in the system.

• «
• 1
• 2
• »

• Denali

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2018 • 6 Fuel-ups

  Property of marcottemw

• 11.2 Avg MPG

• Gmc 3500

  2015 GMC Sierra 3500 HD 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 208 Fuel-ups

  Property of johndeere160lc

• 13.7 Avg MPG

• Great white

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2015 • 65 Fuel-ups

  Property of 2manyliters

• 14.3 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2018 • 13 Fuel-ups

  Property of tbelllis1963

• 15.8 Avg MPG

• 3500 HD

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2018 • 15 Fuel-ups

  Property of finchman82

• 14.7 Avg MPG

• Guzzler

  2015 GMC Sierra 3500 HD SLT 6.0L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2015 • 82 Fuel-ups

  Property of Camstyn

• 10.6 Avg MPG

• Little Red Wagon

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2018 • 142 Fuel-ups

  Property of ANK01

• 13.8 Avg MPG

• 2015 GMC 3500

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 255 Fuel-ups

  Property of nbomar1

• 13.9 Avg MPG

• 2015 GMC 3500

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2016 • 192 Fuel-ups

  Property of modoan

• 13.1 Avg MPG

• Sierra 3500 HD

  2015 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2018 • 5 Fuel-ups

  Property of Crash

• 16.0 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Mar 2018 • 17 Fuel-ups

  Property of exrr35

• 17.5 Avg MPG

• White GMC

  2015 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 70 Fuel-ups

  Property of jambiefsj

• 12.9 Avg MPG

• Denali

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2015 • 203 Fuel-ups

  Property of cowdoc

• 19.6 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2015 • 145 Fuel-ups

  Property of exrr35

• 17.5 Avg MPG

• Tims Denali Dually

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2015 • 98 Fuel-ups

  Property of tjflanman

• 11.6 Avg MPG

• GMC 3500

  2015 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 46 Fuel-ups

  Property of xrayman

• 17.7 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2017 • 5 Fuel-ups

  Property of chinaay

• 10.7 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2017 • 10 Fuel-ups

  Property of Pogobird

• 11.3 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2015 • 75 Fuel-ups

  Property of gjtj

• 14.1 Avg MPG

• My Sierra 3500 HD

  2015 GMC Sierra 3500 HD SLE
  Added May 2016 • 4 Fuel-ups

  Property of Pogobird

• 12.0 Avg MPG

• «
• 1
• 2
• »