Based on data from 36 vehicles, 2,499 fuel-ups and 907,484 miles of driving, the 2019 GMC Sierra 2500 HD gets a combined Avg MPG of 13.50 with a 0.14 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (5) 6.0L V8 GAS (1) 6.6L V8 DIESEL (30) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (10) Cab & Chassis - Crew Cab (1) Any Submodel Base (2) SLT (10) Denali (24)

Below you can see a distribution of the fuel-ups with 27 outliers (1.07%) removed.

Following shows the average MPG of each of the 36 vehicles in the system.

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• My Sierra 2500 HD

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

  Property of tristancruden

• 16.1 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2024 • 29 Fuel-ups

  Property of docweaver

• 14.6 Avg MPG

• GMC 2500 Sierra

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Aug 2024 • 71 Fuel-ups

  Property of lowellburkholder

• 15.0 Avg MPG

• 2500

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Sep 2024 • 10 Fuel-ups

  Property of billy7871

• 14.3 Avg MPG

• Denali 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 20 Fuel-ups

  Property of jseamons

• 14.4 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2023 • 106 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 • 192 Fuel-ups

  Property of cab5385

• 15.1 Avg MPG

• 2019 Denali

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2020 • 178 Fuel-ups

  Property of rick437

• 11.8 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 • 145 Fuel-ups

  Property of midwestcruiser

• 14.0 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2019 • 66 Fuel-ups

  Property of CamaroRacing12

• 16.9 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2024 • 36 Fuel-ups

  Property of motokid340

• 16.0 Avg MPG

• Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2019 • 148 Fuel-ups

  Property of GSD671

• 15.2 Avg MPG

• GMC 2500HD

  2019 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2019 • 116 Fuel-ups

  Property of soundwave216

• 10.6 Avg MPG

• My Sierra 2500 HD

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

  Property of Getbnt

• 14.8 Avg MPG

• My Sierra 2500 HD

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

  Property of 2ndsteel

• 13.8 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2019 • 135 Fuel-ups

  Property of drw94

• 12.7 Avg MPG

• Kyra Hot

  2019 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2018 • 84 Fuel-ups

  Property of GillaFunk

• 14.3 Avg MPG

• Rick

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2018 • 96 Fuel-ups

  Property of d800306

• 15.8 Avg MPG

• 2019 Denali

  2019 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Oct 2019 • 117 Fuel-ups

  Property of Hoserr

• 14.4 Avg MPG

• My Sierra 2500 HD

  2019 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 15 Fuel-ups

  Property of churches13

• 16.3 Avg MPG

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