2025 GMC Sierra 2500 HD MPG

Based on data from 3 vehicles, 13 fuel-ups and 3,877 miles of driving, the 2025 GMC Sierra 2500 HD gets a combined Avg MPG of 14.74 with a 0.56 MPG margin of error.

Below you can see a distribution of the fuel-ups with 3 outliers (18.75%) removed.

Following shows the average MPG of each of the 3 vehicles in the system.

• 2025 Sierra HD

  2025 GMC Sierra 2500 HD Denali V8 DIESEL
  Added Feb 2025 • 3 Fuel-ups

  Property of bopeonline

• 12.5 Avg MPG

• GMC 2500 HD AT4

  2025 GMC Sierra 2500 HD AT4 Automatic 10 Speed
  Added Dec 2024 • 13 Fuel-ups

  Property of machzender

• 14.5 Avg MPG

• AT4

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

  Property of Corey700

• 15.2 Avg MPG