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Hummer
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2008
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H3 Base, Automatic
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Repair and Diagnosis
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Electrical
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Charging Systems
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Battery, Charging System And Starting System
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Diagnostic Information and Procedures
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DTC B1516
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Circuit/System Verification
Circuit/System Verification
Ignition ON, clear the DTC and start the engine. Verify DTC B1516 does not set as current.
If the DTC sets, replace the GBCM.