Different years
Main difference is 98-00 cars have LS1 intake and 01-02 cars have LS6 intake and a milder cam so stock HP is similar.
You can buy a new LS6 intake for $450 so if an 01 costs more than $500 more than a 00 it may not be worth it just for that extra.
There are other differences over the years but most are trivial and have no real bearing on the cars potential.




