[BadBoy1404]

I have a 2000 Chevy 5.3 and I have never heard a knock in my life. It starts excellent every time and i let it warm up for about 5 minutes before driving away. I heard that the 5.3's as well as other vortecs have bad knocking problems so i run premium fuel with Zmax cleaner every other oil change. It dramatically reduces carbon build up. For the people with piston slap, Im sorry and the best of luck to you trying to get compensation.