Part Type: HVAC Pressure Switch. 1999 Dodge Ram 2500 Van Submodel: Base; Engine: 5.2L V8 CNG; EngineVIN: T;. 1999 Dodge Ram 2500 Van Submodel: Base; Engine: 5.2L V8 GAS; EngineVIN: Y;. 1999 Dodge Ram 2500 Van Submodel: Base; Engine: 5.2L V8 LPG; EngineVIN: 2;.