whats it all about and how much does it cost to fix?

 

It appears to be a problem with your EVAP system, which processes fumes from the gas tank. It could possibly be a solenoid, pressure sensor, hose or the wiring involved.

Here is some tech insight on how someone tried to figure out what the exact problem was on another chevy product with the same code.

http://www.obdiicsu.com/Studies/2000...ies/Chevy.html

 

Translation=uber fuxored