computer swap ?

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White Rhino

Newbie
Joined
Apr 27, 2016
Messages
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Location
Georgia
New to the site, and I am going to swap a 2004 5.3 into my 1998 silverado (4.3). Ill be reusing the nv3500 currently in the truck. The PCM I have with the 5.3 is a 12586242, is there any reason I cant use this and repin my harness or is the 12200411 more compatible? Thanks a lot, frickin awesome site BTW!!
 
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