possibly the rear sway bar links
get a book and find out numptey
Sounds like your problem is probably a loose heat-sheild or a loose exhaust. Have it checked.
My 94 Pontiac grand am se quad 4 the clutch is real loose and 1st gear is slipping
assorted loose things
Most of the dashes have printed circuits and they can get cracks or loose grounds.
It provides the proper tension on the serpentine belt so as it is not too tight or too loose.
check your gas cap if its loose replace it
Becuase there is trash in it, or your exhaust is loose.
A rattle can be caused by any loose part.
Loose wire?
Catalytic converters do not rattle. If it does it will need to be replaced as it may block the exhaust. Loose heat shield?
There could be hundreds of different things that could rattle. Give us more details. A common rattle is from the catalytic converter. The inside breaks and pieces get into the exhaust and rattle.