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Home >> GMC >> 2008 >> Yukon Base, 4.8 C >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Hybrid Engine Control System) >> Description and Operation >> Drive Motor Generator Control Module Description and Operation >> Motor Control Module (MCM) 1 and 2 >> Operating Functions
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Operating Functions

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Each MCM operates the applicable electric motor generator based upon HPCM commands. Each MCM controls the speed, direction and output torque of its respective traction motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors (IGBTs).