Blower motor cooling tube I used came off a late model dodge of some sort I had laying around, I used to work at the dealers so it was just a fresh rubber piece I had saved during work. It fit just fine although not an exact match. I would imagine many GM models would have the same match, I know some are long, others short so use pictures to get close to your size or length of tube. Should be easily found.
http://67-72chevytrucks.com/vboard/s...d.php?t=806864
Thread with pictures of hose if you need. Search the web for the part and try a GM hose that looks close.
Bob