This is for a customer having issues with a swap they did. They used a 2005 5.3 from a Silverado, OS 12592618. I know that system uses pressure sensor and low pressure switch going to the AC unit then requests over serial.

Anyone know if there is a way to switch a 1 meg blue green ecm from Serial AC request to switched request like the red blue ecm?

Is it easiest to tune it as a 04-05 express van that already has ac switches and a normal 12v request?

I read somewhere that TC can make the switch, I have EfI Live and HP only.