The best thing to do is go to a GM dealer. Go to the parts dept. and they can look it up and show a diagram of the area on the engine for that part on their computer screen. The part could be discontinued by now. If so go to a parts store and bring your old hose and just match it up as best possible.
I have had to do this with Buick hoses before. I just get something close with the right bends and cut to fit. Hope that helps.