I keep having a popping noise that seems to be coming from the gas tank. Usually shorty after shutting truck off. Its a 1999 Chevy Blazer 4x4 with the TrailBlazer Package. Any ideas what it could be?

 

Had the same popping noise and it was caused by the old original muffler . Changed to Flowmaster 44 ant the noise went away. I now enjoy some ohter noises caused by the new muffler.... (sounds like a big one).

Greetings from Europe, Axel

 

I had the same noise,sounded like a 2 liter bottle popping it turned out my vent hose on the tank was stopped up,replaced it and no more noise

 

Thanks guys. Ill look into that.

 

I'm having the same popping noise on my 99 Jimmy. What does the vent look like and is it easy to clean?