So I keep getting a constant P0449 diagnostic trouble code in my truck
2006 Silverado 1500 ex. cab short box, 5.3 liter engine code (Z) (non flex fuel)
The definition of this code is malfunction of the evap vent flapper valve/solenoid. Doesn't matter how many times I clear the code, it comes on at every ignition cycle. What needs to be done to fix this? How do I know if its the flapper valve or the solenoid that needs to be replaced? Where is this even located on my truck? I've talked to holeshot dan and ls1tom, and both insist this is a common problem with later model GM vehicles. I havent searched to see if there are any TSB's, but my vehicle is already out of warranty so I gotta fix it myself. Any help is appreciated