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Home >> Chevrolet >> 1999 >> Forward Control P12 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Interlock Systems >> Operation >> Brake Transmission Interlock Solenoid
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Brake Transmission Interlock Solenoid

NOTE: Brake Transmission Shift Interlock (BTSI) solenoid may also be known as shift interlock actuator.

Gear selector cannot be moved from Park without depressing brake pedal if ignition is on. When pressure is applied to brake pedal, BTSI solenoid is de-energized to release gear selector from Park. Brakelight switch interrupts circuit to mechanically unlock gear selector by de-energizing BTSI solenoid. See WIRING DIAGRAMS .