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97 express 5l ecm replacement

Discussion in 'GM Powertrain' started by fraNKgtb, Apr 30, 2013.

  1. fraNKgtb

    fraNKgtb New Member

    got a 97 5l express that my scan tool cant see the ecm and no fuel no spark.
    Rreplaced all fuses and relays to no avail

    if i replace my ecm with a used one from the same year and engine will it start right up????

    or do i have to reflash/reprogram it????

    my truck does not have a chip in the key and doesnt have antitheft
  2. Z71_guy

    Z71_guy New Member 1000 Posts

    I think you still have to get it flashed, but its been awhile since i did a used ECM

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