A Loose or worn gas cap may cause Check Engine Light to illuminate.
Car Problem Reports
GMC Acadia Check Engine Light Due to Gas Cap Issue
GMC Acadia Problem
Average Mileage: 81,333 mi (54,000 mi - 100,000 mi)
Visitor, 2007 GMC Acadia, 100,000 mi
I think that is what is wrong now.
Visitor, 2007 GMC Acadia, 54,000 mi
so far, the only thing being talked about with the service center is a diagnostic check for $95 to tell me what the issue is. then it will be on to parts and labor. come on GMC, you can do better!
Visitor, 2008 GMC Acadia, 90,000 mi
Got a new gas cap