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GMC Truck
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2006
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Sierra 1500 4WD V8-5.3L VIN Z Flex Fuel
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Testing and Inspection
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Symptom Related Diagnostic Procedures
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Coolant Heater Inoperative
Coolant Heater Inoperative
Coolant Heater Inoperative
Test Description
2.
Be sure power supply cord is unplugged for 10 minutes prior to testing.
Step 1 - Step 6:
