I have a 2000 chevrolet impala 3.8 ls and i get a p0330 knock sensor low voltage and i replaced it with a dealer part and would it be the wire or what should i look for or start doing to fix this issue? Also i have been watching you for years and your videos help me alot with do if your self job.

check the wiring then from the sensor to the computer. Pray it's not the computer driver circuit, it often is on those GMs