2017-2025 GM HD 6.6L E41-L5P HPT 6-Position Diesel Switch (HPTH-M04-00)This diesel switch is a rotary control interface designed to work with HP Tuners Switch on the Fly operating systems, allowing the user to change between multiple calibration files from inside the vehicle. The switch provides a physical method to select the active tune without reflashing, making it suitable for vehicles configured with multiple custom diesel calibrations. Features Rotary selector switch for on demand calibration changes Designed for
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2017-2025 GM HD 6.6L E41-L5P HPT 6-Position Diesel Switch (HPTH-M04-00)