When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Do you have anything plugged in to the OBD port? There was a GM bulletin about devices like an OBD reader or insurance device that can throw that code.
I have nothing plugged into the old port I have checked the codes though.
Is it possible to be a relay?