According to the owners manual the timing belt should be replaced at 90,000 miles (schedule A) for the 3.5 liter engine
Your 2.5 liter V6 engine has a timing BELT ( also , it is an interference engine )
The Dodge 3.8L has a timing chain that should last for the life of the engine. There is no service interval.
Timing Chain
It has a timing chain
A timing chain normally will last as long as the engine. Signs of a failing timing chain are chain noise and or engine that continues to jump time.
The timing marks on a 93 Dodge Colt with a 1.5 liter engine are located on the timing chain and the cam sprocket. They must line up with each other to ensure proper initial timing.
The 3.8 liter V6 engine in a 2001 Dodge Grand Caravan has a timing CHAIN
If it is the Ford 3.8 liter V6 , or the GM 3.8 liter V6 engine it has a timing CHAIN A little more information please ( make , model , year ) The Chrysler/Dodge/Jeep 3.8L also has a chain, but all parts are metal.
timing CHAIN
Timing Chain
The Ford 4.0 liter SOHC engine has ( 3 ) timing chains and the Ford 4.0 liter OHV engine has ( 1 ) timing chain
According to the Gates website : The 2001 Dodge Stratus : 2.4 liter , 4 cylinder , timing BELT 2.7 liter , V6 , timing CHAIN 3.0 liter , V6 , timing BELT