Where is the oil pressure sending unit on a 2004 Jeep Grand Cherokee Overland?

The oil pressure sending unit on a 2004 Jeep Grand Cherokee Overland (assuming it has the common 4.7L engine) 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., 3.7L or 5.7L Hemi would be different).

To be absolutely certain:

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

2. Use a repair manual: A Haynes or Chilton repair manual for your specific year and model will have diagrams showing the location.

3. Look online: Search for "2004 Jeep Grand Cherokee Overland 4.7L oil pressure sending unit location" on YouTube or image search. You'll likely find videos or pictures showing the location.

It's usually a small sensor with one or two wires connected. Be aware that the area around the oil filter and engine block can get quite hot, so allow it to cool before working on it.