Based on data from 19 vehicles, 2,150 fuel-ups and 592,168 miles of driving, the 2019 GMC Sierra 3500 HD gets a combined Avg MPG of 10.71 with a 0.20 MPG margin of error.

Any Engine Type 6.6L V8 DIESEL (19) Any Body Style Crew Cab Pickup (7) Any Submodel Base (2) SLT (3) Denali (14)

Below you can see a distribution of the fuel-ups with 10 outliers (0.46%) removed.

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

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2022 • 115 Fuel-ups

  Property of XxTMFxX

• 10.9 Avg MPG

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2022 • 554 Fuel-ups

  Property of Big_Judy

• 11.1 Avg MPG

• Sierra 3500HD Dually

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2020 • 457 Fuel-ups

  Property of piller97

• 11.3 Avg MPG

• GMC 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2018 • 162 Fuel-ups

  Property of jwhitten1

• 13.1 Avg MPG

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2023 • 30 Fuel-ups

  Property of FattMatt

• 13.0 Avg MPG

• 19 GMC 3500HD

  2019 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 585 Fuel-ups

  Property of lnikkel

• 6.7 Avg MPG

• 2019 Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2019 • 139 Fuel-ups

  Property of Kturner

• 14.1 Avg MPG

• 3500 HD LB SRW

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2019 • 73 Fuel-ups

  Property of datsabigtruck

• 17.1 Avg MPG

• Black Beauty

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Dec 2018 • 32 Fuel-ups

  Property of doots

• 14.7 Avg MPG

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 59 Fuel-ups

  Property of dmaxx04

• 13.3 Avg MPG

• 2019 Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2019 • 62 Fuel-ups

  Property of joshuaw

• 13.2 Avg MPG

• BLACK BEAUTY -DEF

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 3 Fuel-ups

  Property of doots

• 737.8 Avg MPG

• Dmax

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2020 • 7 Fuel-ups

  Property of bighoss

• 8.7 Avg MPG

• Epicenter

  2019 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 47 Fuel-ups

  Property of Epicenter

• 18.3 Avg MPG

• Big Red

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2020 • 50 Fuel-ups

  Property of spudbudy

• 14.5 Avg MPG

• 2019 Sierra 3500 HD

  2019 GMC Sierra 3500 HD 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2019 • 62 Fuel-ups

  Property of kmeger

• 11.5 Avg MPG

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2019 • 5 Fuel-ups

  Property of worktruck

• 16.0 Avg MPG

• My Sierra 3500 HD

  2019 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2018 • 38 Fuel-ups

  Property of Insuranceman123

• 12.9 Avg MPG

• The Pig II

  2019 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 39 Fuel-ups

  Property of Doverarjim

• 15.2 Avg MPG