Hey everyone I'm at an odd place in the project truck I am building. Its a 1965 C10 on a trailblazer frame, with an LS2 running on a Holley Terminator X Max. The 4x4 is intact still except the wiring for it, I am making the harness right away but the big issue is how do I wake the TCCM up without the rest of the factory components like the BCM? Does the wake signal originate from the BCM? I haven't done any class2 sniffing or anything, will I end up with an arduino and OBD shield to wake it? Or maybe an original BCM installed also just with power, ground and class2 hooked up, wonder if that would work? I obviously do not have a class 2 data source running the Holley.