I just recently been hearing this rattle, sounds like the bed is rattling off when I go over some bumps then other times sounds like its under the cab any ideas?

 

Could be exhaust or what have you, check your spare tire too.

 

i have been having the same problem but cant pin point it i just replaced the ball joints on the pass. side the upper was loose and noticed i have a bad tie rod so im going to change that to but sometimes it sounds like it is coming from the bed well se what happens

 

Its a diesel it susposed to rattle...
Oh sorry its a 3rd gen
I didnt think they knew how to rattle

 

Do you have running boards? I had mine hitting the body mounts and making noise.

 

I had checked exhaust and step rails but not the spare tire so I'll do that tonight when I get home from work.

 

Roll the truck over on its roof and gently tap with a rubber mallet wrapped with a towel (Quiets the blow and keeps the mallet from scratching your paint) looking for something that rattles.

Or you could buy a louder stereo...

 

I had this rattling sound that was driving me CRAZY for months ...

Turns out the jack under the passenger seat had worked its way loose (I have never used or removed it) and was vibrating in the mount.
At least in my case it was an easy fix.

Cheers
-Mark

 

Track Bar? Might want to give that a check.

 

My problem was the heat shield on the fuel tank. The plastic retainer clip broke off and the heat shield was hitting the driveline.

 

Same thing happened with my old 1/2 ton gasser...

 

glad you got the problem resolved