I went with the new sensors and fobs??? The early cars 97-00 use a different sensor and receiver. They are up to $100 per wheel.
I bought a kit that plugs a new receiver right in 4 TPS and 2 fobs all new car GM stuff for $300.
Works great, So what? the early car stuff is harder to get and the price will only go up. You can buy rebuilts as 2K suggests without having cores. They usually go for $30-50. You will need nuts and washers, too.
But I suggest the kit for 300 you have all new stuff. Rebuilts generally have a good chance of working but puttin one in a wheel and finding out it is DOA or dies shortly after really needs to be considered.
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SOLD MY C5 Looking for my next one