2001 Chevy 2500 duramax cruise control
To get a transplant duramax cruise to work you need:
ECU pins:
   Cruise on: pin C2-16 +12VDC to turn on, SPST switch
   Set/decelerate: C1-18 +12 momentary
   Resume/accelerate: C1-22 +12 momentary
   TCC brake switch: C2-59 +12 normal, disconnect on brake
   maybe some others?