2025 GMC Sierra 1500 MPG

Based on data from 3 vehicles, 14 fuel-ups and 4,961 miles of driving, the 2025 GMC Sierra 1500 gets a combined Avg MPG of 23.07 with a 3.71 MPG margin of error.

Below you can see a distribution of the fuel-ups with 0 outliers (0.00%) removed.

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

• GMC

  2025 GMC Sierra 1500 AT4 V8 GAS
  Added Jan 2025 • 3 Fuel-ups

  Property of Lanners

• 14.2 Avg MPG

• Gray Ghost

  2025 GMC Sierra 1500 Denali Ultimate L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Nov 2024 • 10 Fuel-ups

  Property of Neurobit

• 26.5 Avg MPG

• Kevin’s GMC

  2025 GMC Sierra 1500 SLT Automatic 10 Speed
  Added Dec 2024 • 4 Fuel-ups

  Property of kevinharper9

• 18.0 Avg MPG