Should I Change the Timing Chain?

[illzwhy]

Hi all~!!!!

I just bought an old Alero 2001, 2.4L Sedan.

It has 84000 miles on it now....and nothing has been done to its timing belt/chain before...I was told it has a chain?

Shouldn't it be replaced when it was at 60000 miles?

Does anyone know if I should do anything to it....or, if it runs well now, I just leave it and use it as it is?

All replies appreciated~!!!

Thanks all~!!