General Motors (GM) has warned of extended production cuts as it faces a drastic shortage of semiconductor chips for its vehicles in North America. Set for a grueling few month of limited profit, this provides a stark reminder that investment in commodity sourcing and supply chain production will be vital for a transition to clean technologies. On Wednesday, GM added a fourth factory to its list of North American plants that have been forced into production cuts. It did not disclose the specific impact on volumes or which suppliers were affected by the chip shortage, but stated that the decision aimed to protect the output of the companies trucks and SUVs, which are more profitable. GM said it would extend…