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GMC
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2012
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Yukon Base, RWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0010 To DTC P0358
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Diagnostic Information and Procedures
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DTC P0128
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DTC Descriptor
DTC Descriptor
DTC P0128
Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature