My check engine light came on yesterday and I took it to AutoZone and they pulled this code. I took it to the dealership this afternoon and they fixed it in about an hour. I have not gotten my paperwork yet regarding what was done. The service manager did tell me they relocated and replaced the vent. When I get the paperwork I will share more information. Mine is still in warranty.
2014 GMC Sierra SLT w/5.3