hello i'm a new user that just purchased a 2000 milly s superchargered, my car seems to run strong with only 89k on it and the check engine light is on with codes p1173 and p1402, but i have two problems that i am horribly concerned with, i realized the other day when revving my motor in park i heard a knocking sound near the supercharger / timing belt case, couldn't tell what it could possilbily be, 2nd is my car smokes alot when i start it in the moring with light blue smoke but mostly whiteish grey somke for like 30 - 40 seconds or so... ANY info at all would be greatly appreciated.. thanks a bunch brian