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1989 GMC C3500 MPG

Based on data from 1 vehicles, 72 fuel-ups and 11,797 miles of driving, the 1989 GMC C3500 gets a combined Avg MPG of 9.15 with a 0.34 MPG margin of error.

Below you can see a distribution of the fuel-ups with 4 outliers (5.26%) removed.

1989 GMC C3500s For Sale Nearby

  • Jimmy

    1989 GMC C3500 Sierra SLE 7.4L V8 GAS Automatic 3 Speed
    Added Jul 2022 • 79 Fuel-ups

    Property of JStevenG

  • 9.3 Avg MPG

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from other GMC C3500 vehicles (View All)

Tips

Best MPG is affected more by vehicle speed than engine speed.

In response to the tip that there is a "best MPG engine RPM ... ...

by jldude

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