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3. Disconnect the connector at the front axle actuator and check for battery voltage on the ignition 1 circuit. Also check the front axle actuator ground for proper connections. If these circuit test bad repair as necessary checking inline connectors X110 and X109. 4. Check the axle actuator control circuit for an open, short to ground, or short to voltage. If the actuator control circuit checks good, then short the actuator control circuit to Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for TCSCM replacement, setup, and programming Transfer Case High/Low Clutch Reset Four-Wheel Drive Does Not Engage Four-Wheel Drive Does Not Disengage Front Drive Axle Actuator Replacement DTC C0387 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC C0387 59 Unable to Complete Shift Circuit/Component Protection Timeout Diagnostic Fault Information Short to Open/High Short to Circuit/Component
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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