Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 723 (BATTERY, CHARGING SYSTEM & STARTING SYSTEM)DESCRIPTION AND OPERATIONCHARGING SYSTEM DESCRIPTION AND OPERATIONCHARGING SYSTEM INDICATOR(S)CHARGE SYSTEM FAULT
1999 GMC Forward Control 5.7 R, Automatic
Charge System Fault
1999 GMC Forward Control 5.7 R, AutomaticSECTION Charge System Fault
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The IPC illuminates the CHARGE SYSTEM FAULT indicator in the message center when the following occurs:
- The PCM detects that there is a problem with the electrical charging system. The IPC receives a class 2 message from the PCM.
- If the tachometer is less than 500 RPM and the power mode state is in the crank mode then this message will not be displayed. Instead the CHECK GAGES indicator will illuminate.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.