'02 Silverado 'Expanding Can' Sound

Lately I have been hearing a 'pinging' sound from under my Silverado shortly after shutting down.

Sounds like an expanding metal container in the heat of summer.

Has continued even in our wintery cold weather.

Checked the gas cap; no excess pressure in the tank after running.

Everything is running fine (except for my new blower fan problem posted below!)

Any hints?

Thanks!

...John

It's the exhaust system cooling down. I think there is a TSB out on this. It can be annoying, but it doesn't affect the performance nor will it cause any future problems. Mine does the same thing, but it's no big deal to me.

My 2000 and my bosses 2001 both do this. It would've scared the crap out of me when mine did it if I hadn't heard his do it first. Just one of the many normal noises you get to enjoy, owning a Silverado:grinyes:

there is a bulletin on this problem,you have to cut the old heat sheild off the top of the muffler and install a new one.dealer only part.comes with new sheild and 2 big clamps.

i have the same problem cant figure it out