Bad exhaust smell

I have a 2004 Denali and have noted a bad exhaust smell. I previously had a 2002 Tahoe and did not have the same bad smell.

What causes this and can it be corrected?

What are the conditions under which you notice the smell? Could it be the under-body coating if the vehicle is still new? Can you describe the smell? A rotten egg or sulfur smell usually indicates a failed catalytic converter, for example. If that were the case, though, you'd most likely also notice a degradation in performance.

Take care,
Jerry

The smell is similar to a bad egg or sulfur smell. I notice the smell after initially starting the vehicle. The smell is quite noticeable when starting the vehicle in the garage.

the roten egg smell is a resault of the catalytic converter going bad the cause may be missing cillindar or a bad valve ect. have it checked