Great research Summit1le1ss!
High Level recap as I think I presently understand it reading the tea leaves pending the full write-up:
0. Seats have everything we need already in them to work. Cooling fans, heaters, seat module and harness with all wiring and the seat harness pins needed are already there from Recaro.
1. You added wiring harnesses for both driver and passenger seat from BCM? to seats- added wires to body harness - approx. 10 conductors and pins for body harness? Again, seat harness complete and we all have this in our seats already.
2. You swapped in 2SS HVAC switch panel for switches and changed the switch circuit board behind the physical switches for signals that come from the switches before going into BCM. Switch board to BCM connector identical? Looks like defrost/defog switches may stay 1SS and plug into the board directly? Wonder if you swapped 2SS fan speed controller over that it would work from the 2SS buttons as well as the 1SS passenger ring?
3. HVAC BCM (driver underdash - same BCM as for door sill lighting tap?) same across all Camaros so no need to change that out. No reprogramming nor re-flash needed. Just need BCM pin-outs for the added seat heater and cooler wiring.
Seems straightforward enough.
I will probably do this once I find the time.
Now a really interesting side question - are the dual zone HVAC dampers, actuators, etc. also already in place under the dash in the ducting to make that function also? Doubtful as those seem to be significant cost parts vs. standardizing like apparently done in the BCM (software). If they are leaving out 10 body harness wires, you can pretty much bet none of the dual zone HVAC guts exist, but crazy if they did.
