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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1301 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P0621 (Gasoline) >> Conditions for Setting the DTC (Gasoline)

Conditions for Setting the DTC (Gasoline)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The charge indicator signal circuit is shorted to ground or shorted to voltage for 15 seconds.

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