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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 99 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)DESCRIPTION AND OPERATIONCHARGING SYSTEM DESCRIPTION AND OPERATIONCHARGING SYSTEM OPERATIONSTART UP MODE
2008 Pontiac Grand Prix Base
Start Up Mode
2008 Pontiac Grand Prix BaseSECTION Start Up Mode
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
After the engine has started the BCM sets a targeted generator output voltage of 14.5 volts for 30 seconds.
RENDER: 1.0x
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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.