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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 989 (Battery, Charging System And Starting System) >> Description and Operation >> Charging System Description and Operation >> Charging System Operation >> Start Up Mode

Start Up Mode

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

When the engine is started the BCM sets a targeted generator output voltage of 14.3 volts for 30 seconds.

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