weird f***ing noise

[maroca]

so i have this rattle comming from what sounds like the front passenger side i have looked and look for the source of the problem no luck yet its a 01 auto z28 with approx 90k miles my buddies trans am with about the same amount of miles also a 01 i heard it comming from his car too its always at low rpm around 1500 sometimes its worse pulling a hill if i speed up it goes away any one else have a similar situation thanks a billion

[NavdeepWS6]

you pipes might be hitting the cross member thats all i can think of at the moment

had the same problem

where in sac town i can prob meet you to listen and look

[Spaz]

could be a loose heat shield...

[99RTA]

Could be a bad cat too, insides loose will cause a rattle.