Tracy Corvette Parts & Service 5/31/2010Do you have an aftermarket alarm or sound system or other aftermarket accessory that has altered your electrical system? If so, that may be the source of the problem. Otherwise, assuming you have a good battery, check the car in the dark to see if any interior lights, under hood light, or other items are staying on that you would not notice in the daytime. Good luck. Dennis@TracyVette.com, 586-772-0000.