"IT Depends on the motor you have in there. there are 2 3.0V6's offered in that car. One of them is the Ztec 3000 which is a 3.0 V6 DOHC (Dual Over Head Cam-4 Camshafts total) this motor Uses a Timing belt. Also offered is the standard 3.0 V6 this is a pushrod motor and uses 1 camshaft that is in the engine block and uses pushrods to open/close the valves. This motor uses a timing chain."
timing chain don't need to be changed.