2005 body swap to 2002 chassis

[Bubbaray311]

I recently started a project on a salvaged 2002 3/4 ton 2500HD chevrolete with a 6.0 and 4l80. I put a 2005 1500 z71 1/2 ton body on top of it. Since putting the body on and the harness I've been wondering about ideas for the radiator, and fans. I have the electric fans I could toggle up or purchase a aftermarket harness for. The radiator I assume came off a 5.3 considering it was the 1500 series is similar to the 6.0 In all ways except the oil cooler lines is there a adapter or conversion kit for this or do I buy a 6.0 radiator and cut the body to fit?last but not least I'm curious if the key ignition being from the 2005 body will it link up with the 2002 pcm? Or will I have issues with the pcm with this change?

[Truckchevy4]

I would just use the engine harness and all from the 05 if you have it and it will simplify a lot of things for you. If you plan to do electric cooling fans the harness off the 05 will already be there to add the electric cooling fans the only thing you would need to ensure that you have is the cooling fan fuse box and the harness going to the fans. The 05 pcm will also run the 6.0 and 4l80 just have to get a tune done to tell it the new specs. If you are wanting to do away with the cooler lines you can buy a block off plate. If you are wanting to add oil cooler lines just buy the oil cooler assembly and get a radiator that has a oil cooler on it and whatever else you need. The ignition key can be made to work on either pcm as long as you go through the security program to recognize the key.