When it become noisy, or your engine cannot be timed or kept in time correctly.
It does not have a timing belt, it has a chain.
What exactly are you trying to do? Timing is controlled by the computer. Timing marks are on the timing chain gears. I own a 1998 Malibu JJ
All Malibu both I4 or V6 are chain driven. They don't use timing belt. There is no need to service the chain unless there is a slack then andjustment maybe needed.
You don't. The Chevrolet Tahoe does not have a timing belt. It has a chain which requires no scheduled replacement.
The '99 Chevy Prizm has a timing chain, not a timing belt, so it does not need to be replaced.
The 2.4 v6 has a timing chain and does not normally require replacement
Timing chains will normally last the life of the engine and are replaced during a complete engine rebuild.
Timing Chain
Timing chain.
Go to a parts house and purchase a Haynes Manual that is specific to your car.
Timing chain Chain
No, it has a timing chain.No, it has a timing chain.