Does a 2004 Vue L4 have a timing chain or belt? When should it be replaced?

Both the 3.0 & 3.5 V6 engines in the Vue use a cam driven by a belt. Both are interference engines and the belt must be replaced at 100,000 miles. Warning: If the belt breaks serious engine damage will occur. The water pump is driven by the same belt so I highly recommend you replace it at the same time to save labor cost later on.