Based on data from 19 vehicles, 2,374 fuel-ups and 678,566 miles of driving, the 2013 GMC Sierra 3500 HD gets a combined Avg MPG of 12.39 with a 0.13 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (1) 6.6L V8 DIESEL (17) V8 DIESEL (1) Any Body Style Crew Cab Pickup (4) Any Submodel SLE (4) Denali (6) SLT (8) Other (1)

Below you can see a distribution of the fuel-ups with 18 outliers (0.75%) removed.

Following shows the average MPG of each of the 19 vehicles in the system.

• Big Red

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jun 2018 • 290 Fuel-ups

  Property of captmike13

• 13.7 Avg MPG

• My Sierra 3500 HD

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2023 • 95 Fuel-ups

  Property of rjgonz88

• 12.2 Avg MPG

• My Sierra 3500 HD

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 120 Fuel-ups

  Property of asjackman

• 14.3 Avg MPG

• UFS - Truck Black

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jun 2023 • 18 Fuel-ups

  Property of Buta

• 15.1 Avg MPG

• 2013

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 199 Fuel-ups

  Property of tsimard

• 10.5 Avg MPG

• Sierra SLE

  2013 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2019 • 146 Fuel-ups

  Property of Hannon

• 16.0 Avg MPG

• 2013 GMC

  2013 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2017 • 238 Fuel-ups

  Property of marlinsmucker

• 12.3 Avg MPG

• My Sierra 3500 HD

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2023 • 75 Fuel-ups

  Property of sfinzel

• 11.1 Avg MPG

• My Sierra 3500 HD

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2023 • 86 Fuel-ups

  Property of nvolz

• 13.8 Avg MPG

• 2013 GMC SIERRA DENALI 3500

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2018 • 193 Fuel-ups

  Property of Redboyga30318

• 13.3 Avg MPG

• 2013 GMC 3500 HD

  2013 GMC Sierra 3500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
  Added May 2021 • 65 Fuel-ups

  Property of uryguy

• 9.3 Avg MPG

• 2013 post delete

  2013 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2017 • 832 Fuel-ups

  Property of marlinsmucker

• 12.5 Avg MPG

• Sierra 3500 HD

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2019 • 352 Fuel-ups

  Property of sfinzel

• 11.7 Avg MPG

• Diesel Exhaust Fluid

  2013 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2018 • 10 Fuel-ups

  Property of Redboyga30318

• 447.8 Avg MPG

• My Sierra 3500 HD

  2013 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2017 • 4 Fuel-ups

  Property of roperlaine

• 17.9 Avg MPG

• Black Truck

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 4 Fuel-ups

  Property of danikolbus

• 14.7 Avg MPG

• GMC Truck

  2013 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 54 Fuel-ups

  Property of Rileykl

• 18.0 Avg MPG

• GMC pickup

  2013 GMC Sierra 3500 HD SLT 6.6L DIESEL V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Oct 2014 • 6 Fuel-ups

  Property of ronrob

• 11.4 Avg MPG

• Sierra 3500

  2013 GMC Sierra 3500 HD DIESEL V8
  Added Apr 2013 • 23 Fuel-ups

  Property of StoneCrab

• 14.7 Avg MPG