Question about 2005 GMC Sierra 2500HD 4WD
SOUND LIKE FAULTY ALTERNATOR.CHECK ALTERNATOR FUSE.CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES.CHECK FOR DAMAGE OR SLIPPING DRIVE BELT.TURN OFF RADIO TO KEEP FROM LOCKING IT OUT.WHEN YOU DISCONNECT NEGATIVE BATTERY CABLE.TO REPLACE ALTERNATOR.HAVE ALTERNATOR TESTED AT AUTO PARTS STORE FIRST BEFORE BUYING NEW ONE.
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage
Charge Indicator Always On
Did you perform the Diagnostic System Check for Starting and Charging? yes or no
Go to Step 2 yes
Go to Diagnostic System Check - Engine Electrical no
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The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a serial data message from the body control module (BCM) indicating the system voltage.
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
The ignition is on, with the engine off
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