Never. Unless you have high mileage engine apart for another reason one should not need to change chains.
There is no recommended replacement interval given for the chain replacement timing belts are critical, chains are not.
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.
Timing chains will normally last the life of the engine. You replace it when the engine is overhauled or if it becomes noisy.
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 should not need to be replaced under normal conditions.
V6 RAV4 seems to have a timing chain which does not need any periodic maintenance
If oil changes were kept up, never
The 2003 Chevy Malibu does not have a timing belt. It has a chain which should last the life of the engine.
It has a self tensioner, Most often you have to replace the chain it self if it is skipping time or is getting very loose.
Mercedes c200 cdi hasn't got timing belt. Has got chain.
Technically you are supposed to replace the timing belt or chain every 60,000 miles. It is a costly expense to replace it so often but it can be far more costly if you don't. Since your vehicle has a chain the pieces can wear down and eventually break and shoot up into your engine causing catastrophic engine failure which can completely ruin your vehicle.