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Suburban 3500 HD LT
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Repair and Diagnosis
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Transmission
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Transfer Case
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Transfer Case - Mp 3023/3024 (NQH) - Diagnostic Information And Procedures
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Diagnostic Information and Procedures
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DTC C0550: Electronic Control Unit (ECU)
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Conditions for Running the DTC
Conditions for Running the DTC
The TCM runs the program to detect an internal condition at key ON. The only requirements are voltage and ground.
Ignition ON.
System voltage 10.5-18.0 V