White Rhino
Newbie
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!!