Application: 2001-2005 Duramax LB7 and LLY diesel engines
The High Idle/Valet Switch was specifically designed for 2001 through 2005 Duramax diesel engines and provides two modes: high idle and valet. When switched on and cruise control is engaged the high idle mode will increase rpm when the engine is running (up to 1 200 rpm) or in park (up to 1 800 rpm) while valet mode will reduce rpm to a maximum of 2 000 rpm and speed to a maximum of 55 mph and disable all performance enhancements made to the vehicle.
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