Those Saturns are very bad about this issue and is normally the crank sensor. It is a pain in the neck to get to. It has one bolt holding it on to the back of the engine/trans. I use a long extension with a swivel socket because it is buried in the back. If you have a tachometer on the car you can observe the r.p.m.'s while cranking. If while you are cranking the rpm guage doesn't go up a little then the crank sensor is bad and the vehicle wont start. I have literally changed about 30 of them.
Do yourself a favor and get a reg car that does not have these issues and does not have to rely on a computer to run itself...
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