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Engine swap Help

This is a discussion on Engine swap Help within the GM Trucks forums, part of the Vehicle Specific category; I have a 2003 Z-71 with a 5.3 iron block engine with a lot of miles on it. I acquired ...

  1. #1
    Junior Member
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    black
    2002 firebird firehawk

    Engine swap Help

    I have a 2003 Z-71 with a 5.3 iron block engine with a lot of miles on it. I acquired a 5.3 , 2008 model from an avalanche with 67,000 miles on it. This is an active Fuel Management engine. I want to put the 2008 5.3 in my 2003 truck. Could someone give me a rundown on what i will have to change. All help appreciated. Wayne

  2. #2
    Senior Member REVNORR82's Avatar
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    silver
    2002 ws6 ta convertible

    It seems like I would just use the long block and put your accessories and intake and run it might need a tune or something

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  3. #3
    Junior Member Randyboyy's Avatar
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    silver
    1999 mustang

    according to my opinion engine blew up and now I need to replace it. Decided it will be a nice project for me but having a hard time finding a engine...........

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