On a 2007 it's centered between the front wheels where the oil pan is, it faces sideways, not down, requires a 13mm socket.
The 2006 Cadillac STS V-6 engine oil drain plug can be found on the bottom of the oil pan. The drain plug can be removed with a half inch ratchet.
14mm
in the oil pan
in the botton of the oil pan
It should be in the oil pan.
drain plug is on the bottom of the oil pan. IF not on the horizontal, it will be on the side of the oil pan right at the bottom
its in the pasenger side on the oil pan,
On the rear or side of the oil pan
Lower Side or bottom of oil pan
On the bottom rear of the oil pan.
On the oil pan, bottom of engine.
Should be on the side or rear of the oil pan