Is it normal for my engine to rattle? I have an '06 5.3L 4x2 Crew Cab. I just noticed the engine rattles it has 5700 mile on it. I don't seem to happy, my younger brother works for at Chevy Dealer Shop, he says it's normal but has yet to actually listen to it. My older brother has an '01 Tahoe w/the 5.3, and his engine rattle as well, but more than mine. Can anyone advise me before wasting my time in the Chevy Dealer shop just so they tell me, it's okay, it's normal. They did w/my '05 Malibu.... Thanks guys/gals!