Does the timing belt need replacement, if so at how many miles? on 2001 Chevrolet Astro

How often do you change the timing belt? or the water pump?

Asked by for the 2001 Chevrolet Astro
The 4.3L V6 on the Astro Van has a timing chain, and only needs attention if it is noisy.
2 more answers , 1 more comment
Have a 2002 astro van. It has been a good one. Very few problems for over 100.000 miles.
Finally changed the water pump and fan belt with 155,000 miles on it.
My brother has a 2006 astro van and samething for him. It now has 225,000 miles and it is still going strong!
To bad they quit making them. I have had 4 and none were any trouble!!
There is no 2006 Chevy Astro van they stop making them 2005
The water pump usually isn't changed until it begins to leak or can't perform