Where is the oil pressure sending unit located on a 94 Chevy suburan 350?

On a 1994 Chevy Suburban with a 350 engine (likely a small-block V8), the oil pressure sending unit is typically located on the passenger side (right side) of the engine block, near the front. It's usually a small, threaded device with one or two wires connected to it.

However, the exact location might vary slightly depending on the specific engine configuration. It's best to consult a repair manual specific to your Suburban's year, engine code (found on a sticker under the hood), and engine type (e.g., TBI, Vortec) for a definitive answer and diagram. Looking at a diagram will be much more helpful than a general description.