1994 GMC Jimmy Owner's Manual - Page 131

Voltmeter Standard Cluster Digital Cluster I I When your engine is not running, but the ignition on (in theRUN is position), this gage shows your battery's of charge in DC volts. When state of the engine is running, the gage shows the condition the charging system. Readings between the low and high warning zones indicate the normal operating range. a On the digital cluster, box around the voltmeter symbol will begin to flash when the charging system needs service. You can onlydrive for a short time with the reading either warning zone. in If you must drive, turn all unnecessary accessories. off Readings in either warning zone indicate a possible problem in the electrical system. Have the vehicle serviced as soon as possible. 2-77