Due to the fact that the leather is urethane coated, I don't recommend using leather conditioners (especially something like Lexol) because the oils in them will actually attract and hold dirt/grime, and friction will wear the coating on the leather out faster than if you simply keep them clean by wiping them down periodically with a damp microfiber towel. Nothing wrong with using something like Meg's Quik Interior Detailer, Infinite Use Detail Juice, or the like to aid with cleaning (or in extreme cases an APC).
That said, there are also coatings specifically designed to protect urethaned leather which are a great option if you are concerned about staving off wear (especially since Corvette interiors tend to be more exposed to the environment than most if you have a convertible or drive your coupe with the targa roof panel removed).