GM Faces Supply Issues, Siemens to Slash Headcount, and 3 More Hot Stocks

General Motors Co. (NYSE:GM): Though the auto market has proven to be incredibly strong this year, GM still hasn’t been able to gauge the demand for its vehicles — its V8-equipped pickups, to be specific. The Chevy Silverado and GMC Sierra have been flying off the showroom shelves faster than GM can produce them, and the company is now facing production constraints due to a supplier’s ability to make certain drivetrain parts for the 5.3-liter V-8 engine, the most popular powertrain choice.