Car Care Parts # H1963 is a Vacuum controlled Heater Valve

5/8" x 5/8" Hose fitting, vacuum closes

Four Seasons part # 74691 is similar

Fits many GM and Chevrolet Pickups and Subrubans

Also fits 1977-1979 Cadillac Eldorado and Seville

Shipping Discount:  At the time of this listing there are many different radiator caps and cooling system thermostats for sale by Proedesigns on Ebay.  Purchasing multiples of these items at the same time will result in great savings on shipping costs.  Please contact us prior to purchasing mulitple items so we can provide you with an accurate and economic shipping quote.

We are selling the inventory of an automotive heating and air conditioning shop that closed in the year 2000.  The inventory has been in storage on pallets in a closed shop building. The boxes have been opened to cross reference part numbers and take photos. We are NOT in the auto heating and air conditioning business and are selling these parts with NO guarantee or warranty.  Our definition of "NEW" or "Remanufactured" is based on the item part number and appearance of the unit being sold.  The description and photos are of the exact item we will ship unless multiple parts are shown in the listing. We will only make refunds if the item received does not match our description. Please verify that the item will work for you using online cross-referencing, comparing photos to the parts on your vehicle and checking the part compatibility with your automotive technician before purchasing from us.