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GMC
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2003
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Sierra 2500 HD, 4D Pickup Extra Cab, 6.6 1, RWD, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - System & Component Testing - 6.6L
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Fuel Systems
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Fuel Heater Inoperative
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Test Description
Test Description
The number below refers to the step number on the diagnostic procedures.
7
- This steps checks for a thermostatic switch that completes the circuit.