07 classic 4.3 to nbd 5.3

[Nickadamsaaa]

Where can I find a harness and would I need all the wiring from an 04+ or just the harness

[Frenchy]

It's a dealer only part. Junkyards burn them and sell the copper. And you need every strand in the truck. Headlights to tail lights. You're re-wiring the entire truck. You need to do this to keep the proper amount of jiggowatts to keep the transponder properly correlated.

[Nickadamsaaa]

I was meaning the computer etc would the 08 computer work or not

[Frenchy]

No. Jesus Christ. There's more than enough info on this site for you to do it. There's about a dozen guys on here who have done the swap. Myself included. Take 20 minutes to research instead of asking 126 stupid questions and you'll be set.