Vapor Canister leaks gas.

[swampslider]

I noticed a wet spot under the left front end of my 96 Yukon. It was coming from the top center nozzle of the vapor canister. It has a constant drip. I loosened the gas cap, it was under pressure, and it stopped leaking. I swapped gas caps but it still leaks. Any ideas on how to stop the leak. Thanks in advance for any and all responses.

 

[Donnie Yukonie]

Can you post pics of where its actually leaking? Is it the relief valve or the actual body?

 

[SunlitComet]

make sure your tank is not overfilled.