D Dag219 New member Joined Jun 26, 2021 Messages 1 Reaction score 0 Points 1 Jun 26, 2021 #1 Evap monitor defined test failure. Can’t figure this one out. No hard codes or pending codes, just a defined test failure, 2009 Sierra 1500. Truck has been sitting around not being used for a while, only 28,000 miles on it Hints?
Evap monitor defined test failure. Can’t figure this one out. No hard codes or pending codes, just a defined test failure, 2009 Sierra 1500. Truck has been sitting around not being used for a while, only 28,000 miles on it Hints?
