Hello XX XXX XXXXX,
It's not just the wiring,which you would need to have a front body harness complete,There are several computers & modules that are different.The drivers door module,passenger door module,a different BCM(body computer module) & really ,really hope that you could interface the program to these modules.All these devices interact with each other & GM does not make exceptions for such changes.
Master A.S.E Automotive technician
A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician