This HVAC Inlet Door Actuator is designed for use in GM 89018678 vehicles, including 00-06 GMC Yukon models. It is a clip-on mounting style with a left-hand drive and is made from durable plastic material. The actuator has been both leak and durability tested, ensuring reliable performance. This vintage part has an OE/OEM part number of 15-73599 and is not a universal fitment or performance part. It is suitable for use in air conditioning and heating systems and is sold by ACDelco. The inlet door actuator is black in color and does not require any drilling or modifications for installation.