Does a 2003 Chevy Trailblazer have a timing belt or timing chain?

Does a 2003 Chevy Trailblazer have a timing belt or timing chain?

Change the timing belt on a 2003 chevy trailblazer The inline 6 cylinder engine, (4.2) doesn't use a timing belt, it has a chain. ... There are no recommended intervals where as the "chain" would need any servicing.Feb. 18, 2010When do you need to change the timing belt on a 2003 chevy ...