Serpentine Belts and Hoses

Elwoodj wrote:
I still have the original belt and hoses on my 2004 truck with 120000 miles. Would you change them or say if it ain't broke don't fix it?

I would first inspect them to see if there are any problems:

If your belt is cracked at the edges, and "checked" (small hairlline cracks on the wide part of the belt) I would replace it and keep the old one as an emergency backup.

As for the hoses; make the same inspection look for checking and cracking and bulging (especially around the clamps) but before they get warmed up squeeze them. If they compress readily and easily they have probably reached a state of "work" that had degraded their ability to hold their shape. I'd replace any of those. Hoses and belts are cheap and easy to replace, "Preventative Maintenance" on these types of things is a good idea to my mind.