I've now seen 2 and they are both loud and seen to have the stock tailpipe.
There is a black one that alway passes by mu house up a hill and is pretty loud.

 

is it a denali?

or

might be just a muffler welded on like a flowmaster, and not a catback

 

The white one i saw was a Z71 burben but maybe the black one that passes by my house is a denali what diff would that make.

 

My neighbor has a '02 5.3 Burb that sounds like my 5.3 Silverado did stock. One of his buddies has an '04 Denali and it's alot louder than a stock 5.3 truck...it sounds really good for a stock exhaust truck. Those 6.0s are quite a bit louder.

 

denali has different exhaust. i think the denali, escalades, and SS silverado all pretty much have the same exhaust. must be what they hook up to that 6.0

 

yea if thats the stock sound its pretty good.

 

i've heard them at idle. but i never heard them on take off.

 

My wife's '04 Denali sounds excellent. I catch myself standing in the garage listening to the exhaust every time she leaves the house! It definitely sounds better than my VHO's stock exhaust, the only difference I can see is the Denali tip (and of course length between the CAT's and muffler). Maybe that tip (resonator?) makes the difference.

 

Who knows i really want to hear a stock SS since thats the exhaust im getting.

 

i drove an SS over a year ago. it sounded good. but i liked my borla better. and my borla is quiet.