When should the Timing belt be replaced and how much will it cost? on 2010 Chevrolet Malibu

I have one with 115000 miles and the belt has not been replaced this engine has no valve clearance so I want to replace it at the proper interval

Asked by for the 2010 Chevrolet Malibu
My information indicate that the 3.6L engine does not have a timing belt. It has a timing chain and gear design.
2 more answers
I show a timing chain. Timing chains are designed for the life of the engine. Unless damaged, no replacement is needed.
agree with #1 and #2