[47 Fasttoys]

"Displacement on demand is what GM calls "VATS" i think. Yes, it gets removed" Actually DOD is a system in which GM cuts off 2 or 4 cylinders by lowering oil pressure to the lifters for those cylinders. VATS is Vehicle Anti Theft System. Vats must be removed in a computer re-flash for a stand alone set up. DOD on the other hand requires changing lifters and a reprogram. Some other things may also be involved in removing DOD.
Rob