Unable To Perform Shift
Table of contents
C0387 GMC Possible Causes
- Faulty Transfer Case Motor/Encoder
- Transfer Case Motor/Encoder harness is open or shorted
- Transfer Case Motor/Encoder circuit poor electrical connection
How do I fix code C0387 GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the C0387 GMC code
The cost of diagnosing the C0387 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0387 GMC Description
Transfer case encoder is a switch that converts shaft position into electrical signals for use by the control module. The control module supplies an 8-volt reference and a ground circuit for the encoder Hall-Effect sensors to function. The control module supplies current limited to 5 volts on all the channels, and as the channels are pulled to ground, the module can interpret the location of the transfer case shift position. DTC C0387 sets when the transfer case is unable to successfully complete a shift to requested mode or range.