2025 GMC Sierra 1500 MPG

Based on data from 7 vehicles, 39 fuel-ups and 13,827 miles of driving, the 2025 GMC Sierra 1500 gets a combined Avg MPG of 21.65 with a 2.08 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 7 vehicles in the system.

• My Sierra 1500

  2025 GMC Sierra 1500 Denali
  Added Jan 2025 • 13 Fuel-ups

  Property of ValiantV

• 22.2 Avg MPG

• GMC Truck

  2025 GMC Sierra 1500 Denali
  Added Feb 2025 • 4 Fuel-ups

  Property of gmpearl

• 27.1 Avg MPG

• AT4 GMC 2025

  2025 GMC Sierra 1500 AT4 V8 GAS Automatic 10 Speed
  Added Jan 2025 • 5 Fuel-ups

  Property of Lanners

• 13.9 Avg MPG

• ‘25 GMC AT4X

  2025 GMC Sierra 1500 AT4X
  Added Jan 2025 • 4 Fuel-ups

  Property of XtraTQ

• 18.5 Avg MPG

• Kevin’s GMC

  2025 GMC Sierra 1500 SLT Automatic 10 Speed
  Added Dec 2024 • 6 Fuel-ups

  Property of kevinharper9

• 18.1 Avg MPG

• Gray Ghost

  2025 GMC Sierra 1500 Denali Ultimate L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Nov 2024 • 11 Fuel-ups

  Property of Neurobit

• 26.8 Avg MPG

• 2025 Denali Ultimate

  2025 GMC Sierra 1500 Denali Ultimate
  Added Jan 2025 • 3 Fuel-ups

  Property of reece650

• 15.0 Avg MPG