Based on data from 29 vehicles, 2,124 fuel-ups and 768,463 miles of driving, the 2019 GMC Sierra 2500 HD gets a combined Avg MPG of 13.42 with a 0.15 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (5) 6.0L V8 GAS (1) 6.6L V8 DIESEL (23) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (9) Any Submodel Base (2) SLT (8) Denali (19)

Below you can see a distribution of the fuel-ups with 24 outliers (1.12%) removed.

Following shows the average MPG of each of the 29 vehicles in the system.

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• Rick

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2018 • 91 Fuel-ups

  Property of d800306

• 15.9 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2024 • 21 Fuel-ups

  Property of docweaver

• 14.7 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2023 • 80 Fuel-ups

  Property of junglejim

• 15.7 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Jul 2020 • 157 Fuel-ups

  Property of cab5385

• 14.9 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2024 • 3 Fuel-ups

  Property of motokid340

• 14.6 Avg MPG

• 2019 Denali

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2020 • 145 Fuel-ups

  Property of rick437

• 11.8 Avg MPG

• Kyra Hot

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2018 • 76 Fuel-ups

  Property of GillaFunk

• 14.8 Avg MPG

• 2019 Sierra 2500 HD

  2019 GMC Sierra 2500 HD 6.0L V8 FLEX Automatic 6 Speed
  Added May 2019 • 211 Fuel-ups

  Property of Jason35

• 11.6 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2019 • 50 Fuel-ups

  Property of CamaroRacing12

• 16.7 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2019 • 124 Fuel-ups

  Property of drw94

• 12.7 Avg MPG

• GMC 2500HD

  2019 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2019 • 103 Fuel-ups

  Property of soundwave216

• 10.5 Avg MPG

• Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2019 • 128 Fuel-ups

  Property of GSD671

• 15.1 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2022 • 214 Fuel-ups

  Property of CPM4UA

• 11.3 Avg MPG

• GMC Sierra Duramax 2500 HD 4WD

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 120 Fuel-ups

  Property of midwestcruiser

• 14.0 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2019 • 115 Fuel-ups

  Property of 2ndsteel

• 15.4 Avg MPG

• 2019 Denali

  2019 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Oct 2019 • 104 Fuel-ups

  Property of Hoserr

• 14.6 Avg MPG

• Gmc Sierra 2500

  2019 GMC Sierra 2500 HD 6.0L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added May 2019 • 81 Fuel-ups

  Property of buggin2004

• 10.4 Avg MPG

• 2019 Denali

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2021 • 82 Fuel-ups

  Property of JarrettR

• 13.2 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2020 • 11 Fuel-ups

  Property of Sharp07GT

• 27.7 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
  Added Apr 2020 • 49 Fuel-ups

  Property of fasdon

• 8.9 Avg MPG

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