I have yet to even pull the top plastic cover off my Duramax, but wondered if someone in the know could explain how the wastegate actuator works?

A quick glance today looks like it picks up boost from near the intake manifold and opens up the wastegate at a predetermined pressure to bleed off boost.

Wow...the 6.5 engineers sure overengineered boost control...(vacuum, sensor, solenoid...)

I bought a cheap boost valve that goes inline to fool the actuator. Must be a restrictor of some sort?