Aluminum thermostat housing compatible with OEM part numbers 12597172 and 12607291.Interchange numbers include 12607291, 12622410, 12618159, and 902-2094.This housing is designed for use in select Captiva, Impala, Regal, LaCrosse, Cobalt, Equinox, HHR, Verano, and Terrain models.Constructed from aluminum, it supports efficient thermal management and helps maintain proper engine coolant flow.The design aligns with standard specifications for fitment and performance in typical replacement applications.Installation follows standard procedures and does not require special tools.