"Chains only need replacing if they wear out. Change your oil regularly and they should last as long as the car". - Scotty Kilmer
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.
Timing chains never need to be changed, only belts.
It has a chain with a cam gear and crank gear.
Should last the life of the engine and is normally changed during an overhaul.
never
I think they recommend to change it each 160-180K miles.
Every 80,000 kms
A timing chain will normally last the life of the engine and is replaced during a complete engine rebuild.
the timing belt should be changed every 100k but if its chain driven then you will get at least 200k out of it but probably more
Depends on the year which you filed to list. Refer to your owners manual. It may have a chain and not a belt.
Pontiac Grand Prix does not have a timing belt. It has a timing chain and it is replaced when it breaks.
in answer to your question the timing belt should be changed every 55/60 thousand miles