HVAC Recirculation Door Actuator. 1999 Chevrolet C3500 Engine: 5.7L V8; Air Inlet Recirculating Actuator;. 1999 Chevrolet C3500 Engine: 6.5L V8; Air Inlet Recirculating Actuator;. 1999 Chevrolet C3500 Engine: 7.4L V8; Air Inlet Recirculating Actuator;.
