Until 2008, General Motors held the title of the world's largest automobile manufacturer for 78 years. The recession of 2007-2009 and its accompanying financial crisis saw GM declare bankruptcy, receive over $50 billion in government bailout funds, and experience a significant decrease in demand for its products. One area where GM saw huge decline in demand was its highly profitable large truck and SUVs sector. In response to the fall in demand, GM drastically reduced the production of larger trucks and SUVs, including discontinuing its Hummer brand. 

Explain what determinants of households demand contributed to the decision by GM to significantly reduce production of its large trucks and SUVs.