2004.5-2005 Chevy GMC 6.6L Duramax LLY DSP5 Key Lock SOTF Switch

Professional-grade 5-position selector switch featuring a high-quality key lock mechanism, built to withstand the rigors of heavy-duty truck environments.

Engineered with crisp detents to provide tactile feedback, ensuring precise and reliable selection between your EFI Live tuning maps.

Offers ultimate versatility, allowing you to instantly switch between 5 custom performance levels—ranging from daily fuel economy to max-effort racing—without the need to stop or reflash the ECM.

Enhanced security features: The integrated key lock allows you to lock your preferred tune in place, preventing unauthorized adjustments by valets, technicians, or other drivers.

Protect your engine and transmission by locking the switch in a safe Tow or Valet mode whenever your vehicle is operated by others.

Specifically engineered for 100% DSP5 compatibility with the 2004.5-2005 GM 6.6L LLY Duramax platform.