I have a 2008 Escalade and the check engine light just came on. GOt the code scanned and it came back as "evaporative emission system high purge flow." From my google findings it is more than likely the purge valve on the engine. I can find info for other Cadillas cars but nothing for an Escalade.

Anybody have any info on the location and how to test it? I've read it's either the one on the engine or the one by the rear axle. There are plenty of videos showing the location on Tahoe's and Suburbans but nothing on the Escalade. Any help is appreciated.