* Check your owner's manual: This is the most reliable source. The towing capacity will be clearly stated inside.
* Look for a sticker: Often, a sticker on the driver's side doorjamb or inside the glove box will list the vehicle's specifications, including towing capacity.
Without knowing the year and engine of your Grand Caravan, I cannot provide a precise towing capacity. Generally, it's lower than many SUVs and trucks, typically in the range of under 3,600 lbs (1,633 kg), but again, this is just a general range, not a guaranteed figure.