Description: Auxiliary Heater. Exc.Air Cond. Heater Pipe Assembly To Pipe. Outlet. Helps provide heat to the vehicle interior Constructed from high quality material for a long service life This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type