Looking for a part number

Hello all!

I want to flush the coolant out and switch to Prestone EL. Tired of having the GM Dex-Cool sludge up after so little time (just had it done 10 months ago, it already looks like sludge).

I bought the T kit to do it myself, but here's my question. I'm not crazy about the idea of cutting the main heater hose to spice the T in. What I want to do is buy a 2nd hose. That way i'll keep one with the T in, then when I'm done with that I'll put a good hose on and fill it up.

I've been looking for the part number (any part #..GM, Autozone, etc) for that main heater hose, but no luck.

1999 3.8 NA GT.

Thanks!

there are two heater hoses, here are the part numbers in GM (dealer only):
upper-(at core) outlet- 10427571 $28.75
lower-(at core) inlet- 10427568 $28.72
Good year also lists part numbers, but both are cut-to-fit which usually means they are a semi-universal pre-molded hose.
upper-63115
lower-63824
Hope this helps you out.

I bought the Goodyear hoses from summitracing.com and they worked fine. The heater hoses didn't look like they were bent quite the same as the factory hoses, but the length was good and once I put them on they bent the same as the factory hoses and it wasn't enough bending to kink the hose.

The radiator hoses were a perfect fit.