This should be fun. 1200$ for the dealership to fix it.

Evaporator Emissions System vent valve/solenoid system.

 

There is an older thread on here if you type in that error code in the search box. Parts run from 32 bucks to $150. Looks like an easy fix. I have to correct this on my 06 Silverado.

 

Part # 25932571 is what you are looking for. It's the vent solenoid which is sometimes confused with the purge solenoid. This part is located under the bed more than likely towards the spare tire. I found the part @ oehq.com for like $19! Don't get bent over the service counter at the dealership!

 

Yeah ive found a few good links. Im going to make a video and or take detailed pics of this fix when i do it. thanks for your help!

 

Yea, feedback is what makes this site helpful. I have to do the same thing as well so I'll be posting as much info as I can as well! Good luck!