[Jamal]

I got an 02 4.3L V6, and whenever I take off from a dead start, or just start up in the morning....pretty much any time I am driving below 6-7 mph, I got this wierd sort of rattling noise. Like a muffled spray paint can or something. Any ideas?

 

[Nicholas]

any more description?? any idea where its comin from?? a lil more info might help us out some...cuz i have no idea rt now.

 

[HBjeff]

cats can rattle at certain RPMs/speeds. my 94 did that.

 

[upstageright]

My 99 Sierra does the same thing.I am also getting noise from my heater coil that sounds like a class 2 rapid.It lessons as the truck warms up. please help it's driving me crazy!

 

[Jamal]

any more description?? any idea where its comin from?? a lil more info might help us out some...cuz i have no idea rt now.

I wish I knew where it was coming from. If I had to guess, I would say drivers side, fairly close to the cab.

 

[BuiltNotBought99]

Sounds like maybe the cat to me.

 

[Jamal]

I am hoping it is just something like that. My damn SES light came on this morning. I tried the gas cap thing, but that didn't work.

 

[Ryan]

Could be your exhaust. My moms 02 trailblazer has been making some sort of "ticking" sounding noise at low speeds also. They told her it was her exhaust pipe where it meets the header...something to do with the gasket on there.