A Look at the 2020 GT500 Exhaust, Valves and Fix For Exhaust Mode Selection Not Available Error Message

The dreaded “exhaust mode selection not available” message being seen on some 2020 GT500 isn’t new to Mustangs as it’s also been experienced by GT350 owners. There are a number of reasons why the message can come up — from melted harnesses, blown fuses, sticking butterfly valves, failed actuators, to other reasons. M6G member Epiphany has spent a lot of time getting to know this exhaust system and shares what he’s seen to date.

See the tech tip write up and video.