Drive by wire

It's controlled by a dual element throttle position sensor at the throttle pedal and a feedback stepper motor at the throttle body. The ECU reads the position of the throttle pedal and positions the stepper motor accordingly. GM has been doing it for a long time with good results.

Why do you need schematics?
 
BlackRod said:
What's the benefit of this?

Less slack, and flex in the pedal motion. More precise inputs. Allows you to change the sensitivity if need be.

Allows you to step back trottle position much easier electronically, instead of mechanically pushing back as happened on the LS1 F-bodies.