Both issues were fixed by disconnecting and then reconnecting the battery. All is well now.
By the way anyone who runs into this problem and buys the new superseded part to fix it will notice the wire connectors don't match up. You will have to buy the wiring harness adapter to get it done...
I have a 2007 GMC Yukon XL Denali with a check engine light on. Advance Auto checked the codes which are P0449 & P0455. I have not had any gas cap tightening issues. I read lots of posts all over the internet that led me to replace the EVAP valve/solenoid. I used a newer improved version from...
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