The procedure for this repair is too complex to list here. Go buy a Hayne's or Chilton's Repair manual. It will have detailed instructions for this repair. You need photos along with instructions.
There is no maintenance schedule for replacing a timing chain. Timing chains are designed to last the life of the engine and are normally replaced during a complete engine rebuild.
a timing chain
The 2.2 litre four cylinder engine in a 2002 Pontiac Grand Am has a timing CHAIN
The timing chain is designed to last the lifetime of the engine unlike the timing belt.
The GM 3.4 litre V6 engine has a timing CHAIN
On a 2005 Pontiac Grand Prix : Both the 3.8 liter V6 engine and the 5.3 liter V8 engine use a timing CHAIN
The 2.4 liter four cylinder engine in a 2000 Pontiac Grand Am has a timing CHAIN
The 2.2 litre four cylinder engine in a 2003 Pontiac Grand Am has a timing CHAIN
It does not have a timing belt, it has a timing chain that requires no maintenance.
You do not have to change the timing chain. It is designed to last the life of the engine.
It has a timing chain which will last the life of the engine.
It has a timing chain that will last the life of the engine.