Ok, I have a 2010 gmc sierra with a 5.3, and my cel came on this week. I went to advance auto and used their scanner and it came back P0449 evap vent solenoid valve. They don't have a part for it. And I googled it and can't find anything past an 06 that has the issue. The scan tool they have is only updated to 08 models, Could this be an issue with a different code for newer models?

 

Nobody?

 

The code is probably valid.
could be a loose gas cap, if not, likely the vent valve solenoid at the tank.

do you want to fix it your self or are you going to a shop.?

 

I removed and installed the gas cap a few times to check that. No luck.

Ill prob fix it myself since I think the emissions warrenty is expired since I have 47k on it. I guess Ill have to go to the stealership for the part though since my local part store doesnt have it. Any idea how much they cost?

 

allgonoshow is right on the vent valve solenoid.i replace alot of them for that code.yes it is a dealer only part.some are cheaper than others but i think the truck ones are around 100 bucks.