To know for sure if *your* specific 2001 Dodge Grand Caravan has manual height adjustment, you need to:
* Check the seat itself: Look for a lever or crank under the seat cushion or on the side of the seat. This is the typical mechanism for manual height adjustment.
* Consult your owner's manual: This will definitively state what features your specific vehicle has.
If you don't find a lever or crank and your owner's manual doesn't mention it, your seat likely does not have manual height adjustment.