I just did a 5.3 to 6.0 swap in my 2001 Tahoe the 6.0 is stock I did nothing to it. Know do I just send my 5.3 pcm in and tell them to tune it for 6.0 do I tell them the year of the new motor or is there more to it than that

 

Get with Nelson performance and you can send it to them. They have a sheet of questions that you can fill out and they will tune it for your specific needs