1998 Chevrolet Blazer Owner's Manual - Page 144

Vo1'-- - --* Gage I When your engine is not running, but theignition is on (inRUN), this gage shows your battery's state of charge in DC volts. You can only drivefor a short time with the reading in either warning zone.If you must drive, turn off all unnecessary accessories. Readings in either warning zoneindicate a possible problem in the electrical system. Have the vehicle serviced as soon as possible. Shift Light You have the shiftlight if you have a manual transmission. This light comes on very brieflyas a bulb check when you start the engine. When the engine is running, the gage shows the condition of the chargingsystem. Readings betweenthe low and high warning zones indicate the normal operating range. Readings in the low warning zone may occur when a large number of electrical accessories are operating in the vehicle andthe engine is leftat an idle for an extended period.This condition is normal since the charging system is not able to provide full power at engine idle. As engine speeds are increased, this condition should correct itself as higher engine speeds allow the charging system to create maximum power. SHIFT Shifting when the indicator light is on will help you get the bestfuel economy. See "Shift Light" in the Index. 2-70