Where is the oil sending unit on a 1991 Chevy pickup?

On a 1991 Chevy pickup, the oil pressure sending unit is typically located on the driver's side of the engine block, near the oil filter. However, the exact location can vary slightly depending on the engine (e.g., 4.3L V6, 5.0L V8, 5.7L V8, 6.2L V8, etc.).

To be certain, you should:

1. Consult your owner's manual: This is the best resource for the specific location on your truck's engine.

2. Use a repair manual: A Haynes or Chilton repair manual for your specific year and engine will have diagrams and detailed instructions.

3. Look for a small, one-wire sensor near the oil filter: The sending unit is relatively small and usually has only one wire connected.

Remember to turn off the engine and allow it to cool completely before attempting to locate or work on the oil pressure sending unit. Oil is hot and under pressure.