Greets,

Tools needed : A glass/cup half full of water

Step 1 : Open the hood and start the engine
Step 2 : Take the water cup in hand and position yourself at the front of the engine (passenger side of the car)
Step 3 : Dribble the water onto the drivebelt just past the steering pump.

If the noise abruptly stops it's the belt that needs changing.
This works on any car, not just caddys.

Toodles,
DJSG3