The over pressure tire sensor system on the vette trips off around 42psi.
Try reducing your tire pressure to 227kpa or 33psi as when the tires get
warm/hot on hwy driving the pressure will increase a few psi.
Nitrogen helps with the tire pressure swinging low and high and will also
help if your tires leak in the early spring when the temp ranges go from
low to high during the day and night.
I added Nitrogen to my tires last summer and would not add air again.