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GMC
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2014
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Sierra 2500 HD SLT, 6.6L Eng VIN 8, RWD
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Repair and Diagnosis
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Engine Performance
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System
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Data Communication System
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Diagnostic Information and Procedures
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DTC U0400 - U05FF: Control Module Error
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Conditions for Setting the DTC
Conditions for Setting the DTC
The control module is not configured properly.