Solenoid or canister?

[bangon]

Still getting evap code P0449. Canister is at back of yukon. Is there a way to test if solenoid is working or if it's the canister? We blew out the canister as best we could but code still comes up after clearing it. Thanks for all the help
2007 yukon denali 6.2

 

[Fless]

Read through the short thread below and that should help. @swathdiver posted the official test procedure if you choose to use it.

Error Code P0449-00 On 2008 Tahoe

This error code comes back almost immediately after erasing so it's persistent. The code reader notes "Evap Vent" and then "Solenoid Control Circuit" then "Short to Ground-Fail" and "Open Test - Fail". Any opinions if that points more at the wiring or to the solenoid? I went through this kind...

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