It should last the life of the engine and is normally replaced during an engine overhaul.
There is no recommended replacement interval given for the chain replacement timing belts are critical, chains are not.
Timing chain usually needs to be replaced each 180-200K miles.
never
the 2001 does not have a timing belt,instead a timing chain,which does not required replacement as often as belt
The chain will last the life if the engine and does not require changing.
A timing chain will normally last the life of the engine and is replaced during a complete engine rebuild.
If the engine has a timing belt, it should be changed around the 150K mark. If there is a timing chain, it does not have to be changed unless it is damaged.
Unless a timing chain is making a noise or has jumped a tooth, they need not be replaced. Timing belts need changing according to the specs spelled out in the owner's manual.
you will replace the timing chain when mornig cold start becomes noisy Normally it will last the life of the engine, and is replaced when the engine is overhauled.
Unless there is something wrong with it (there shouldn't be), you should never have to replace the timing chain. That's the beauty of chevy.
It has a chain with a cam gear and crank gear.
You should never have to replace it. The timing chain is designed to last the life of the engine. It is normally replaced when the engine is overhaul.