In this video we replace the vent valve on the fuel tank of a 2007 GMC Acadia. The check engine light was on and the code was P0449. This operation involves lowering the fuel since the valve is located on top of the tank.
Below are the links to the parts I used.
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Thanks!

https://amzn.to/3TLvYzs
https://amzn.to/3DkRCoF