Check Engine Light trouble

[Irishgreg6]

I have a 2019 Silverado RST. Check engine light came on and was throwing a P0449 evaporative emission vent valve solenoid malfunction code. The dealer replaced the part and the light is still on. They had it for 4 days and I gave up and had to have it back. I’ve reset it myself and it also comes back on. Has anyone heard of this or have any suggestions? Thanks in advance! 

[fish_guru]

My previous 07 Silverado had evap problems for the last several years of ownership.

 

My '19 had a whistling noise under light acceleration. The vent hose for the gas fill assembly was too narrow and/or collapsing on itself making the noise. Maybe have them check that out.

 

Also I know that over filling the tank when fueling can cause gas to back up into the charcoal canister and cause evap error codes. Don't squeeze that last gallon in the tank or round up to the nearest dollar. When the pump kicks off you're done.

 

The good thing is your truck is under warranty. Let them fix it. Hope you get it sorted out.

[Irishgreg6]

Thanks! I’ll have them check that as well