Where is the oil sending unit in a 1985 Chevy silverado?

The oil pressure sending unit on a 1985 Chevy Silverado is located on the engine block, near the oil filter. It's typically a small unit with one or two wires connected to it. However, the exact location can vary slightly depending on the specific engine (e.g., a 305 small-block versus a 350 small-block or a different engine entirely).

To be certain, you'll need to:

* Consult a repair manual: A Haynes or Chilton manual specific to your 1985 Chevy Silverado with the correct engine will have a diagram showing the exact location.

* Look at your engine: With the oil filter area clean and visible, carefully examine the engine block near the filter. Look for a small, threaded fitting that likely has electrical wires attached to it. This is the most likely candidate.

Be careful when working around the engine, and ensure it's cool before attempting to locate or replace any components.