Charge Indicator

WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Instrument Panel Cluster (IPC) illuminates charge indicator in message center when following occurs:

If PCM detects that generator output is less than 11 volts or more than 16 volts, IPC receives a class 2 message from PCM requesting illumination.
IPC determines that system voltage is less than 11 volts or more than 16 volts when IPC receives a class 2 message from Body Control Module (BCM) indicating system voltage.
When IPC performs displays test at start of each ignition cycle, indicator illuminates for approximately 3 seconds.
Ignition is on, with engine off.

Along with charge indicator illumination, 4 chimes will sound when a charging system malfunction is detected.