all ls1s have that little slap/knock but like they said if it doesnt go away once its warm then there is an issue..mine has had it since i bought the car in 03 lol... also lookout for alot of smoke driving or reving it up..yes they are oil burners but u have to watch out for worn seals, rings...also always check the rpo codes..someone can always bs u saying such and such came stock..def keep an eye out on the 01 and 02s as well as the ls6 intake some also came with the ls6 heads casting number is 243..u could get lucky and find one.. good luck on your search.
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 ~*Maddie*~ |