Coil hold-down bolts..

In the event you fellow vortec 4.2L owners have not had your ignition coil attachment bolts out yet, you may want to remove, never-seize and reinstall them ASAP! Check this thread: http://forums.trailvoy.com/showthread.php?t=10784

G/luck
Joel

Im with Joel, if you are doing minor maintaince work on your I6, it only takes a few minutes to do this and a few dollars. Might not seem significant now, but when you go to replace the spark plugs, it might be a really big problem.