help me what is this part
 

Attachment 11689Need help what is this part water is coming out of it the botttoms broking

Coolant elbows There is two one upper & one lower here's a link for both...
LIhttps://scontent-a-iad.xx.fbcdn.net/...72933060_n.jpgNK:2000 Chevrolet Monte Carlo HVAC Heater Hose Connector - Dorman 47065HP | StockWiseAuto

As I always say....replace with aluminum versions that way this will never hapoen again

I just replaced mine last friday night. It was a fairly easy job, just needed a second set of hands when pulling the tensioner and getting the serpentine on and off, but all in all took about 1 1/2 hours, including the test drive. I unfortunately didn't replace with the aluminum ones listed above in Zjerry's post, and wish I had of, but it gives me a reason to rip everything apart and clean it all up in the future.