How do i replace a purge valve solenoid on a 2007 malibu?

The solenoid is located on the driver's side of the engine area next to the intake manifold. It is a relatively simple removal and installation once you remove the cover for the intake. This may or may not solve your issue, by the way, and only further testing can isolate that part as the source of your problem. Codes do not diagnose a problem, rather, they give clues as to how to troubleshoot further.