Part Type: HVAC Blower Motor Resistor. 2003 Chevrolet Silverado 2500 Submodel: Base; Engine: 5.3L V8; EngineCode: LM7; EngineVIN: T; with Heavy Duty Heater;. 2003 Chevrolet Silverado 2500 Submodel: Base; Engine: 6L V8; EngineCode: LQ4; EngineVIN: U; with Heavy Duty Heater;.
