New LS1 Owners - Newbie Tech - Rattling from fron passenger side

I was cruising down the highway listening to a cd, i mute the cd and i can hear this rattling coming from the front passanger side. Sounds likes its coming from around the glove box area. The only time you can hear it is when you are travling at around 45 or more. I know this is a longshow but does anyone have an idea as to what it might be? Also, how would i be able to check where its coming from?

Are you sure it's coming from the front? Could be from the spare donut tire or jack in the back on the passenger side. I have had repeated rattles from there. If you think it's coming from up front and maybe under the car it might be the CAT about to go bad.

Hmmm.. Well it MAY be the cats because i got my car tested and got codes P0420 and P0430, several peopl ehave said it may be the cats, i guess i must have just barely passed inspection when i had it done last week.

it could be your passenger seat, they're known to come loose and rattle

how many miles are on your car? Unibodies start to rattle when the miles gets up there. Good excuse to put on sub-frames!

mine rattles from the passenger side also,but its the seat belt,next time it does this grab the belt and see if it stops.

Heat sheilds under the car?

my car has like 57k miles, i'll try the seatbelt thing but then again it only does it when i go above 40-45mph.

Heat sheilds under the car?
Pipes and cats aren't that close to the body but the heat shield was all i could think of.

I have a spring that rattles under the seat that sounds like it is coming from the glovebox on both my cars.

I have a spring that rattles under the seat that sounds like it is coming from the glovebox on both my cars.
Is that where that frig'n sound is come'n from?!!!!!!!!