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Order mine through Autozone. They occasionally run a sale.
Here are the Goodyear part numbers:
Poly-V Belts
4040420 Poly-V, w/AC
4060802 Poly-V, Alt & PS
for a 2000 part numbers are: a/c 4040420, alt & ps. 4060798 is what goodyear and pickproparts.com are showing. Replacement Products for CHEVROLET CORVETTE - 2000 5.7L V 8 Eng
Part No. Applications Usage Metric Part No. Replace By
Poly-V Belts
4040420 Poly-V, w/AC
4060798 Poly-V, Alt & PS
Tensioners
49283 Accu-Drive Tensioner, PS & Alt Drive
49297 Accu-Drive Tensioner, AC Drive
Idler/Tens Pulley
49006 Idler Pulley
49021 Tensioner Pulley, PS & Alt Drive
Interesting that they changed the belt size on Alt, power steering belt for only two years according to the Goodyear website. 1999-2000 use the 4060798 and all the other C5 years use the 4060802.
Tensioner and idler pulley numbers are all the same all model years. So they must have used a different size pulley on either the power steering pump or alternater those years. Very small difference since the belt length works out to only 4/10 of an inch (4060798 is smaller).
Geez, I have too much time on my hands tonite, I'm outta here !!