Where is the oil sending unit located on a 1995 Chevy 454?

The oil pressure sending unit on a 1995 Chevy 454 is located on the driver's side (left side) of the engine block, near the front. It's usually a relatively small unit with one or two wires connected to it. It's often positioned near the oil filter, but not always directly on it. You might need to consult a repair manual specific to your 1995 Chevy 454 to get the exact location, as there can be slight variations depending on the exact engine configuration.