I've had this check engine light on for a while now and I have had the code ran multiple times. It says is a large or gross evap leak. I've done some research and talked to some people and we believe it has something to do with the Fuel Vapor Pressure Sensor. I was wondering if anyone knew where this would be located on a 2007 grand prix gxp. Also if anyone has any other suggestions as to what may be causing this light let me know!
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