I'm struggling with understanding how this system is better than the OEM A/C in a GMT400. The only claim I can see that is different is they say their blower motor "delivers 20% more cubic feet of air per minute than standard blowers" but that's not a direct comparison to a GMT400 blower..
The concept of electronic controls and actuators instead of cables and vacuum lines was already accomplished by GM for the first year of this truck generation.
And the OEM system has the option of fresh air or recirculate mode.
So other than the VA system is new, and expensive, .... ???
Richard