As far as I am aware the DTS foot throttle is an option with the new Verado engines. They had a really smart one that have discontinued. The DTS (fly by wire) is the same as a Hot Foot but with and actuator bolted on the side, so nothing particularly trick.
i work on general digital and some analoge pwbas and electrical work for post office, repair £10m of kit at my office... dabble in PSUs, peltiers, earoms, timing ccts etc. some solenoids and hydraulics too.. used to do do car sparkyin and in car stereos/tvs etc..
is this a loaded question jonny? or genuine curiosity