Mike, if you're asking if you need to notify as a passenger, that is something I am rather curious about myself.
Have not been pulled over yet when someone else is driving, but existing laws do not specify (in Ohio, anyways) if you must notify when a passenger.
Simply a blanket statement of "Must notify officer during law enforcement interaction". But if I am a passenger and we are pulled over, they are not interacting with me, are they? Seems a bit of a grey area.
"The best diplomat I know is a fully charged phaser bank" - Montgomery Scott