I to have the same question, it looks as if there are 4 wires from the cruise switch to the TAC module.

I am just having trouble figuring out how the V8 harness is routed from the switch to the TAC? I have the complete DBW setup from a 03, it has one harnes from the DBW pedal and one connection on the engine harness these all feed into the tac module.

I have the diagram for a 2003 just let me know if you need it.