All stories on technology

• Take a Virtual Factory Tour

• Interactive graphic: the four cycles of an engine

• How engines work

• Active Fuel Management: balancing fuel economy and power

• Horsepower, torque, and other power terms

• Built for horsepower or torque? See if you can guess

• Navigating with latitude and longitude

• The first man-made satellite

• What can a satellite do?

• Satellites, GPS and OnStar

• How OnStar helps people every day

• Diagram: How OnStar uses GPS