* 3.9L V6: This was a fairly common engine option.
* 4.7L V8: A more powerful option, but less common than the V6.
To know for sure which engine is in *your* specific 2001 Dodge Dakota SLT, you should check:
* The vehicle's title or registration: This will often list the engine displacement.
* The sticker on the driver's side doorjamb: This will have a list of options and specifications, including the engine type.
* The owner's manual: If you have it, this will specify the engine.
Looking up the Vehicle Identification Number (VIN) online through a vehicle history service might also reveal the engine details.