For 1990-2009 cars

The automatic transmission shift lock control system prevents the driver from shifting out of Park without pressing the brake pedal. The shift lock solenoid is energized when the ignition is in the ON position and the vehicle is in Park. The shift lock solenoid is mounted near the floor shifter in the front floor console, and mechanically locks the shifter from moving. When pressure is applied to the brake pedal, the shift lock solenoid is de-energized and releases the locking tab on the floor shifter.