The DOHC SL2 has a timing chain.
Timing chain
The 4 cylinder Saturn's all had timing chains.
Timing chain
It does not work because it has a timing chain instead.
You are correct that the SL2 uses a timing chain. However, since it uses a timing chain it does not need to be replaced as does the timing BELT. In general, a timing chain should last the life of the engine.
No, there is no timing belt on any of the the 4 cylinder Saturns, they all use an internal timing chain.
This proceedure is covered in the chiltons Saturn book available at auto zone and ect.
No such thing as a timing chain belt. It is either a belt or chain. Replace the belt according to the schedule in your owner's manual. If it breaks and your engine is an interference engine, you will 95% of the time have damage. You will know the extent of the damage when the engine is torn down. The 1992 SL2 has a timing chain. Mine has 240,000 miles on it and is still running fine.
The SL2 series used a 4 cylinder, dual overhead cam engine with a timing CHAIN that did not need replacing until the head was removed. You DO, however, need to properly maintain the serpentine belt, which drives the alternator, power steering, AC, and water pump. Don't let THAT belt break, since the engine will overheat quickly and can damage the head gasket. But... you don't need to worry about the timing belt, since there isn't one. The timing chain is INTERNAL, and is constantly lubricated, making it last much longer than a timing belt.
Get a service manual. Removal of the timing chain cover and head is needed first.
That would be never. All s-series have timing chains. (chain will stretch and get noisy if car oil not checked and changed on regular basis)