Sometimes ebay will have it if you can find the part number or even gmparts direct. Ebay is likely to be cheaper.
Printable View
If you are talking the factory heater hose setup, then you are probably stuck going with the GM replacement. I swapped ours out back in 2010 or so when the original setup was 8 years old and it did cost about $200. A lot of guys simply yank the stock stuff though and run regular heater hose. Using a reflective heat wrap is a good idea to protect the hoses from the exhaust if you go this route.