To find the correct size, you must consult your owner's manual or a reliable repair manual specific to your vehicle's year, make, model, and drivetrain. Alternatively, you can:
* Check the nut itself: If you can access one of the nuts, use a socket wrench set and try different sizes until you find the one that fits perfectly. Mark the size once found.
* Go to a parts store: Take the Caravan to an auto parts store like AutoZone, Advance Auto Parts, or NAPA. They can usually identify the correct size based on your vehicle's information (VIN is best).
Using the wrong size nut is dangerous and can lead to wheel failure. Accuracy is paramount.