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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1427 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P0621 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects low voltage on the generator turn on signal circuit for 2 minutes.

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