To be certain, you'll need to:
1. Consult a repair manual: A repair manual specific to your Jeep's year, make, model, and engine will give you a precise diagram and location.
2. Use an online parts diagram: Many online auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your vehicle's details and view diagrams showing the sensor's location.
Searching for "1997 Jeep Grand Cherokee [your engine size] crankshaft position sensor location" on Google Images may also yield helpful visual results.
Important Note: Always disconnect the negative battery terminal before attempting any work near the engine or sensors.