The Brake Transmission Shift Interlock (BTSI) system prevents the driver from shifting out of PARK without pressing the brake pedal. The BTSI solenoid is energized when the ignition is on and the vehicle is in PARK. The BTSI 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 BTSI solenoid is de-energized and releases the locking tab on the floor shifter. The BTSI system can be manually overridden in case of system malfunction.