How do you adjust park brake on 2005 Pontiac G6?

There are two possibilities, one if it's a lever type it is under the lever itself. Pull it up & look inside and you can usually see the adjusting screw. Two if its a foot pedal type it is adjusted at the rear-end by the wheels. If it's a two thousand five and already needs adjusted I'd say someone is not disengaging it completely or not at all before they drive.