Start by checking 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.
The cost to diagnose the P0C0B GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
This is an internal fault detection of the drive motor generator Power Inverter Module (PIM) Assembly. The PIM monitors the Drive Motor '1' Inverter. The ECM sets the OBDII code when the Drive Motor '1' Inverter is not to factory specifications. This fault is handled inside the PIM and no external circuits are involved.
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