This heater climate control unit is a perfect fit for your 2003-2006 Dodge Ram 1500 or 2500 3500. It is designed to keep your interior comfortable and cozy during cold weather. The unit has a sleek black finish that blends well with your vehicle's interior. It is compatible with interchange part numbers P55056323AC, P55056323AD, and 55056323AC, and OE/OEM part numbers P55056323AC and 55056323AC. The manufacturer part numbers are also P55056323AC and 55056323AC. This high-quality unit is ideal for those who want to keep their vehicle's interior warm and comfortable during the winter season.