I believe it is a water temperature operated vac. Block. Depending on the number of ports it has, that's the number of things it controls when it's working properly. If you go down to a parts store with the car, they can look at it, give you the proper name for it, and either sell you the part, or send you to the Dealer with the correct name of the part. Hope this helps you out. Mickey-d
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Thursday, December 3rd, 2009 AT 7:14 PM