Brake Transmission Shift Interlock Override
This allows the shift by wire system to override the Brake Transmission Shift Interlock (BTSI) through a override switch located in the floor console. To activate this mode, press and hold the override button (The GSM will flash once after one second), press any non P button then release the override button. If vehicle system has low voltage, this function will require the vehicle to be powered using an auxiliary power source.