Yes
chain
No, the Grand Cherokee uses a timing chain which will most likely never need replaced, they are extremely durable.
Chain
It has a timing chain.
The 2003 2.5 CRD Jeep Cherokee has a cam belt not a chain
The 2005 Mercury Grand Marquis , 4.6 liter SOHC , V8 engine has ( 2 ) timing chains ( 1 timing chain to each cylinder head )
Chain
On a 2005 Pontiac Grand Prix : Both the 3.8 liter V6 engine and the 5.3 liter V8 engine use a timing CHAIN
When do you replace the timing chain on a 2005 Suzuki Grand Vitara?
The 3.3L and 3.8L both have timing chains.
The 2005 Jeep Grand-Cherokee has 12 valves.
No. The V6 in a 2005 Jeep Grand Cherokee was a 3.7L.