Custom OS on my 2005 Sierra?

[Stoichiometric]

I have a 2005 2500HD Sierra truck, I would like to know if I can tune the pcm with a custom operating system for SD for use with a single turbo ~12psi on a 408? I want to purchase the commercial version with the capability for O2 input and data logging. Also, will I be able to tune my truck and my dad's 02 Corvette with the commercial version without any additional licenses?
Thank you for the response, I need the :help2:

[Tordne]

Generally you get 2 VIN slots when you purchase personal/Commercial license. So that will cover you for both the 2005 Truck and the 02 Vette.

As far as custom OS goes check the tutorial and see if there is a matching Custom V3 OS for your stock OS.

[Stoichiometric]

Thanks for the info, is there any difference purchasing EFI direct or through someone who is a 'dealer'?

[Tordne]

Shouldn't be too much difference. A dealer in the US may have stock that can get to you quicker than shipping from New Zealand.