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I've been running Mobil I since 8000 miles and it's probably saving me. There was a big explanation written to me from a GM tech of another forum but I lost it, and I am still trying to find it. When I do I'll post it.

I'm hunt'n for an 04 I can put a blower on. These trucks are just too cool.

I heard about piston slap but this knock never goes away, it just gets very subtle. :confused2:

I've been told since about 36M miles that these 5.3's just have poor oil circulation when cold and to ignore my knocking, ticking etc., until warm. Well it's always knocking now just quieter when warm. Can I do anything?

Newbie here!!!! Hello everyone! I just had to offer some comments about OnStar. OnStar told me I was OUT of luck trying to get an adapter, or any sort of upgrade and that stinks. I like hitt'n the button when I'm lost, much less the pleasure of using it on trips and such and I have to say...