To be absolutely sure, you should:
* Consult your owner's manual: This is the best source for your specific truck's information.
* Look at a parts diagram: Online auto parts stores (like AutoZone, Advance Auto Parts, etc.) often have diagrams you can view by entering your truck's year, make, and model. These diagrams clearly show the sender's location.
* Visually inspect your engine: With the engine cool and the oil level checked, carefully look around the oil filter area for a small, single-wire sensor.
Remember to be careful when working around the engine; it can be hot even after being turned off for a while.