Where is the oil sending unit located on an 1989 Pontiac Lemans?

The oil sending unit on a 1989 Pontiac Lemans is located on the bottom of the engine block, usually near the oil filter. However, the exact position can vary slightly depending on the specific engine (e.g., 2.5L, 2.8L, or 3.1L). You'll need to consult a repair manual specific to your Lemans' engine to pinpoint its precise location. A visual inspection, after carefully removing any necessary shrouds, is the best way to locate it once you have a general idea of its vicinity.