04.5-05 GM 2500/3500HD 6.6L Duramax LLY PPE 111002200 High Idle Valet Switch

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.