You haven't stated the year which is always helpful . - In most Grand Caravans the trans dipstick is between engine and firewall about centre. The dipstick handle is usually yellow.
In the same opening of the dipstick.
The yellow dipstick near the battery.
you have to add through the dipstick tube
It is a dealership special tool.
How do I check my transmission fluid on my 2008 dodge grand caravan ... to service a 2014 Dodge caravan w/c van that doesn't have a dipstick to check fluid
The 2001 Dodge Grand-Caravan has a 4-speed automatic.
The 2004 Dodge Grand-Caravan has a 4-speed automatic.
The 2005 Dodge Grand-Caravan has a 4-speed automatic.
The 2010 Dodge Grand-Caravan has a 4-speed automatic.
The 2006 Dodge Grand-Caravan has a 4-speed automatic.
The 2002 Dodge Grand-Caravan has a 4-speed automatic.
The 2007 Dodge Grand-Caravan has a 4-speed automatic.