I recently got a check engine light on my Equinox. The code that popped up was P171A and P171B. I can't seem to find any information anywhere about this. Said something like transmission surge solenoid valve open. I don't even have 30,000 miles on it yet. Can someone please shed some light on this? Thanks!

 

take it to Chev for a warranty claim. It might new a new tranny control module.