Posted 3/9/2008 20:39 (#330120 - in reply to #329896) Subject: Re: Chevy's 6.0 vortec gas engine
WCNY
I have a 2002 3/4 ton with 40k and I had a knock since about 6k, the Dealer told me to use 5w 30 instead of the recomended 10w 30. I have and the only time it does it now is when it is real cold and then only for a couple of minutes.