***Hi my 2005 chevy equinox is making like a low rattling noise while idling on park.its kind of annoying i just did an inspectiin and passed. If i hit the gas it goes away but while idling it does it what can it be? Please help other than that the car working wonderful. I had just changed all my mount, oil pan gasket, changed oil, did a tune up changed the breaks and ran it thru diagnostic no codes. Don't know what else to do.***