Alright, so i was just taking a closer look at my truck for the first time, getting under it and really getting dirty. well i found i black box behind the drivers rear tire. it was kinda hard to get a picture but i will try again today. i have an 03 Jimmy ZR2. and i just want to know what it is.

thanks guys!

 

This would be the charcoal canister.

 

as mgout said it's a box of charcoal. it is supposed to soak up fuel vapors i believe. (fuel evap system maybe?)

anyway, leave it alone. it's more afraid of you, than you are of it.

 

The charcoal canister stores fuel vapors from the gas tank and fuel system, and then burns them during normal engine operation.

My blazer was recieving the code P0446 (EVAP canister vent blocked)
So I had this off to check it. But while taking it out of the bracket that it sits in, my bracket broke. So, yea, if you don't need to touch it, don't!!
The problem in mine ended up being the vent solenoid.

 

ok cool thanks guys! never heard of a charcoal canister before, haha good to know

 

guess you've never worked on any of your vehicles before.

 

ITS A BOMB! OMG! Run for your life!!

 

no i haven't, never really had the chance. my old car was a shared vehicle with my sister so anything i did just got ruined. but im learning basics right now. my dad was never really a get dirty kinda guy so i never really was in a shop.

but i wanna start, thats why im here!

 

then you've come to the right place, and bought the right vehicle-'cause you're definately gonna have things to repair on your Blazer, bwahahahaha!

 

HAHAHAHA Gotta luv the encouragement!!