• 6.5L GM Diesel

    by Published on 11-02-2020 13:57
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    Optimizer 6500
    Diesel Power for AM General's HMMWV

    Written by Jim Bigley
    Photography by the author & AM General
    All Rights Reserved

    This article first appeared here in TheDieselPage.com in 2007.


    Since 1984, AM General's High Mobility, Multi-purpose Wheeled Vehicle (HMMWV) has been powered by the Detroit Diesel designed GM 6.2L & 6.5L diesel engines. GM's production capacity, overall low cost and adequate performance made the original GM engines a natural choice for AMG's front-line military rig. Many evolutionary changes were made to this ...

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