1977 GMC K25 MPG

Based on data from 2 vehicles, 60 fuel-ups and 7,948 miles of driving, the 1977 GMC K25 gets a combined Avg MPG of 8.08 with a 0.32 MPG margin of error.

Below you can see a distribution of the fuel-ups with 17 outliers (22.08%) removed.

Following shows the average MPG of each of the 2 vehicles in the system.

• GMC High Sierra

  1977 GMC K25 High Sierra 6.6L V8 GAS Automatic 3 Speed Standard Cab Pickup
  Added Jul 2023 • 74 Fuel-ups

  Property of Erich309

• 8.7 Avg MPG

• The Rat

  1977 GMC K25 Sierra Classic 4.8L L6 GAS Automatic 3 Speed
  Added Jan 2019 • 5 Fuel-ups

  Property of HonestBob

• 14.3 Avg MPG