ACDelco 15-63531 GM Original Equipment Auxiliary Air Conditioning Evaporator Core Channel-plate construction provides a high refrigerant contact surface area, resulting in better performance Vacuum-brazed, corrosion-treated, and leak-tested to help provide trouble-free operation GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function