[mik2718]

Or did you mean using an already stored voice tag?

Speech Recognition — Using
1. Push and hold the talk
symbol steering wheel
control until you hear
a beep. The audio
system will mute.
When you are in the navigation screens, the
system will display a symbol (|) while the speech
recognition is active.
2. Clearly state one of the commands

In this case,

Go <Voice Tag>

or

Go To <Voice Tag>