What year and trim level is your car? I purchased the vacuum tee alone from a Pontiac dealer for $2.32.
Here'* an excerpt from a rant I did almost a year ago:
Today - While replacing all the rubber vacuum lines on the EVAP system this past weekend, I found out that the little rubber "tee" vacuum connector that goes on the throttle body is badly cracked and, if not leaking already, will shortly fail. This piece isn't available at AutoZone or Advance, so I called ****** Pontiac Parts Dept. today (they're not open weekends at all). Parts guy told me that they no longer sell that part because it'* no longer available. He said he could see it in the system, but it shows as "not available" (for a freakin' '97??). So I asked him for the part number, so I could find it elsewhere, like a junk yard, etc. NO!! "The system doesn't show the P/N because it'* not available." (More BS!!)
I called another dealership that I found online. It'* about 45 miles away. Sure, of course, they have them in stock for $2.32!! Sure they will ship it to me UPS ground. I should get it tommorrow. Oh, and the P/N is 24502852!
So, the PN is 24502872.
Once you have the P/N, everything changes. I actually got the P/N by calling GMPD and talking to a tech there.