This was a few years back that I drove professionally however I thought there was a kill device on most big rigs, the military had 2 kill switches on thier Vietnam era trucks that I drove back in the late 80's. The switch in the Navy trucks was a crude pull type device that I assumed cut the fuel flow. I am thinking that most of the trucks I drove after the military had them too.
Current Truck: 2016 GMC Sierra Denali Duramax. every option with exception of rear seat video. Let the customization begin.
Former Truck:2012 GMC Sierra SLT 2500 HD Crewcab, Duramax, Z-71 (4x4),Bilstein Steering Stabilizer, EGR fender flares, Century cap with interior carpet, BedRug, S & B cold air intake, stainless nerf bars, Banks DPF back Monster Exhaust, GM Under rear seat box, Edge