Where is the oil filter on a 2006 Cadillac STS with V6 engine?

On a 2006 Cadillac STS with the V6 engine (likely a 3.6L), the oil filter is located on the passenger side (right side) of the engine, towards the front. It's usually fairly accessible, but you might need to maneuver around some components to get to it. It's a spin-on type filter, so you'll need an oil filter wrench to remove it.