Does the Dash Wiring Harness for the speedo/gauges, and all interior accessories also have to be swapped to an LSX dash wiring harness? I was going to use a PCM of the same year, only for the LS1 but wasnt sure if it would work with the V6 dash wiring or not...

I already checked TACreationsusa and the diagram says it doesnt, however some people say it does. So Im trying to see what all I'll need before undertaking this project.