Where is the oil pressure sending unit on a 1999 Dodge Diesel engine?

The location of the oil pressure sending unit on a 1999 Dodge Diesel engine (likely a Cummins ISB or possibly a different Cummins engine depending on the exact model of Dodge truck) varies slightly depending on the specific engine and year. However, it's generally found on the front of the engine block, near the oil filter.

To be certain, you should:

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

2. Refer to a repair manual specific to your engine: A Haynes or Chilton manual (or a similar brand) will have diagrams showing the location.

3. Search online for a diagram of your specific engine: Use your engine's model number (found on an engine plate usually near the valve cover) in your search. Images of the engine will often clearly show the sending unit.

Caution: Always be careful when working around hot engine parts. Allow the engine to cool completely before attempting to locate or access the oil pressure sending unit.