I took my car into speed inc. and my SES light was on they said it was the knock sensor, on the car when they checked it out. they said either one of my wires on my knock sensors is being pinched when the ls6 intake was installed (not by them). or it just needed a new sensor. i need to take my car in for emissions soon and i need this light off. i mean sometimes if i unplug my battery it will be off for a while then it will end up going back on... and sometimes it turns off??? i am confused!!! if it needs new knock sensors how much do those run? where can i get them??? if i left it would it pull timing from the motor to compensate???

 

You could call the dealership to get the part numbers and order them through http://www.not-a-sponsor.com/.

 

Why not just have asked Speed to do the work there? Im sure they've delt with some knock sensors in their time and would've been able to cure the problem.