Service Vehicle Soon Message Display
I have a 2000 C5 Corvette and Service Vehicle Soon Message Display I try hold the option button while pressing the fuel button 4 times then release press the option button again to cycle through the codes and reset them as you go and it cleared. but as soon as I start the car back up it comes back Service Vehicle Soon Message if I hit the rest button it goes away till I start the car back up took it to the dealer they can't find no codes no one knows what the hell it is any ideas would help thank you for your Time.