2021 GMC Sierra 2500 HD MPG

Based on data from 70 vehicles, 4,273 fuel-ups and 1,376,528 miles of driving, the 2021 GMC Sierra 2500 HD gets a combined Avg MPG of 13.17 with a 0.12 MPG margin of error.

Below you can see a distribution of the fuel-ups with 20 outliers (0.47%) removed.

Following shows the average MPG of each of the 70 vehicles in the system.

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• 2021 GMC Sierra 2500 Denali

  2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Feb 2021 • 15 Fuel-ups

  Property of WydOpen

• 15.2 Avg MPG

• My Sierra 2500 HD

  2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Feb 2021 • 31 Fuel-ups

  Property of whytebeast

• 12.9 Avg MPG

• Paul’s Sierra 2500 AT4

  2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added May 2021 • 16 Fuel-ups

  Property of Pboerschlein

• 15.8 Avg MPG

• Black Betty

  2021 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 6 Speed
  Added Jan 2021 • 26 Fuel-ups

  Property of nickgray17

• 13.6 Avg MPG

• My Sierra 2500 HD

  2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Dec 2020 • 11 Fuel-ups

  Property of duraron

• 13.4 Avg MPG

• GMC Sierra 2500 HD

  2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Mar 2021 • 12 Fuel-ups

  Property of 85burban

• 11.7 Avg MPG

• AT4

  2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Feb 2021 • 44 Fuel-ups

  Property of powell1983

• 12.9 Avg MPG

• Terry’s Sierra 2500 HD

  2021 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 10 Speed
  Added Mar 2021 • 7 Fuel-ups

  Property of DragonKat

• 14.7 Avg MPG

• Blacky

  2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2021 • 4 Fuel-ups

  Property of OhioDuramaX

• 16.5 Avg MPG

• My Sierra 2500 HD

  2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Nov 2020 • 7 Fuel-ups

  Property of stanjod

• 13.9 Avg MPG

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