1996 Chevrolet Corvette Owner's Manual - Page 120
1996 Chevrolet Corvette Manual
Page 120 highlights
Voltmeter When the engine is not running, the voltmeter shows the voltage output of your battery. When the engine is running, it shows the voltage outputof the charging system. If you must drive ashort distance with the voltmeter reading in a shaded area, turn off all your accessories, including your comfort controls and audio systems. For numeric gauge measurements, press the GAUGES button on the trip monitor until VOLT appears. The numberthat appears next to the fuel gauge is the battery voltage. El VOLTS 18 Readings between the shaded areas show the normal operating range. The reading will change as the rate of charge changes (with engine speed, for example), but the if voltmeter reads in either shaded area, and it stays there, you may have a problem with the charging system. Have it checked right away. Driving with the voltmeter readingin a shaded area coulddrain your battery. 2-77