question on chevy suffix code

Discussion in 'Engine Topic' started by cutty, Jun 4, 2012.

  1. cutty

    cutty Veteran Member

    Likes Received:
    Dec 12, 2008
    ontario canada
    picked up a truck to use as a parts hauler,guy i got truck from claims he had gm install a new crate engine,but has lost the paper work, does anyone know or have the suffix codes for them?
    heres what i got from the pad on the front

    1MO620, and below it

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