Buick Envision 1.5T Brake Light Switch 13597423 Original Replacement Direct Installation

This brake light switch directly replaces OEM number 13597423, with universal compatibility and a snug fit. It controls brake light illumination, and also sends the brake signal to the transmission and ECU to ensure proper shifting and cruise control operation. Fits Buick Enclave 1.5T; after installation it resolves brake light not illuminating, shifting snag, or cruise control failure. If the brake lights are intermittently on/off or the transmission reacts slowly when braking, the switch is likely aging and replacement will restore function.