Originally Posted by 1stGenCRXer

You can't be serious...

A diesel lacks spark plugs, but certainly not a throttle plate. You still control the speed of the engine by restricting or allowing air into the engine, the ignition source just happens to be the superheated air, and the timing comes from when the fuel is injected into the engine.

So yes, some trucks will have a BOV. I have no idea where you'd find one, but some do.