join the club of false knock on 99-2001 mine was doing it everytime i floored my truck and again only when it changed into 2nd mine says 8 degrees constant no different. Alot of people have had this in there trucks and some trans ams and camaros. Jerry2500 has the best fix but some people are fixing this with some special setup on ls1edit.

 

Alot of us with the 99-00's have been to the false knock movie...99silver5.3, creederado, and myself to name a few. The 02 PCM works like a charm