Can't do that. I leave here at about 6am and don't return till about 8pm.

Damn....

Its really not that bad of a sound, you cant hear it while in the car and the windows are rolled up...

The only time you can hear it is when the windows are down... or when outside the car...

Hope it is nothing serious...

If your coupler is bad you can drive with it like that for a long time without causing any damage.

LOL, well, as with all things it seems lately....

I took the car to the GM dealer today...

I heard the noise today when i took it out of the garage, it sounds more like it is coming from the bottom of the car, like the exhaust...

But after turning the car off and bringing the mechanic out to hear the rattling noise and turning it back on again - it would not rattle!

He revved it up, and it would still not make the noise - just a smooth quite sounding engine...

No idea what it could have been...

Here'* hoping it doesn't return...