The "T" fitting in my windshield washer plumbing cracked and broke, rendering the washer system completely useless. One of the branches is smaller than the other two, so I couldn't find an equivalent tee at my local parts store. GMPartsDirect.com told me that this is GM part# 14017780, "3/16x3/16x1/8 nylon tee", but that it's discontinued. NalleyGMC shows to have one in stock for $1.20, but they want $18 for shipping. Multiple online sources show Auveco 12924 to be an equivalent part. I just bought a box of 10 for $5 + $4 shipping. I'll update this thread after I verify that the Auveco part works, just in case anyone else has the same problem. If it works, I'll have a few extra available.

 

http://www.clipsandfasteners.com/Nyl...6_p/a12924.htm
Ain't it a bummer when you have to buy them bulk,when you only need one

 

Any auto parts store will have one that works.