Where is the oil filter for the 2009 Cadillac STS?

The oil filter for the 2009 Cadillac STS is located on the driver's side of the engine, near the front, just below the exhaust manifold. It is accessible from underneath the vehicle, so it's often easier to change the oil filter while the car is lifted. Make sure to use the correct tools and take precautions to catch any oil that may spill during the removal process.