A new truck, manufactured by General Motors Corp. (GMC), had a defective alternator that caused it to stall on a busy highway. The driver set up emergency flares around the stalled truck, but congestion on the highway made them difficult to see. Davis did not see the flares, drove his car into the back of the stalled truck, and was killed by the impact. His widow sues GMC. GMC moved for summary judgment, alleging (1) no duty to Davis, (2) no factual causation, and (3) no foreseeable harm. Should summary judgment be granted?