2025 GMC Sierra 2500 HD MPG

Based on data from 8 vehicles, 50 fuel-ups and 15,999 miles of driving, the 2025 GMC Sierra 2500 HD gets a combined Avg MPG of 13.01 with a 0.74 MPG margin of error.

Below you can see a distribution of the fuel-ups with 1 outliers (1.96%) removed.

Following shows the average MPG of each of the 8 vehicles in the system.

• Denali

  2025 GMC Sierra 2500 HD V8 DIESEL
  Added Feb 2025 • 5 Fuel-ups

  Property of petestoy

• 17.2 Avg MPG

• 25 AT4X

  2025 GMC Sierra 2500 HD At4x
  Added Mar 2025 • 4 Fuel-ups

  Property of tritz4

• 13.6 Avg MPG

• GMC 2500 HD AT4

  2025 GMC Sierra 2500 HD AT4 Automatic 10 Speed
  Added Dec 2024 • 18 Fuel-ups

  Property of machzender

• 14.5 Avg MPG

• GMC 2500

  2025 GMC Sierra 2500 HD SLE Automatic 10 Speed Crew Cab Pickup
  Added Feb 2025 • 5 Fuel-ups

  Property of SoloRX7

• 12.0 Avg MPG

• JKM DuraMax

  2025 GMC Sierra 2500 HD AT4 DIESEL Automatic 10 Speed
  Added Jan 2025 • 6 Fuel-ups

  Property of BigKen

• 10.5 Avg MPG

• 2025 Sierra HD

  2025 GMC Sierra 2500 HD Denali V8 DIESEL
  Added Feb 2025 • 12 Fuel-ups

  Property of bopeonline

• 11.8 Avg MPG

• Whitey

  2025 GMC Sierra 2500 HD SLT V8 GAS
  Added Feb 2025 • 4 Fuel-ups

  Property of Triple6T666

• 12.4 Avg MPG

• AT4

  2025 GMC Sierra 2500 HD SLE Automatic 10 Speed Crew Cab Pickup
  Added Jan 2025 • 7 Fuel-ups

  Property of Corey700

• 14.9 Avg MPG