startup on 2005 Saturn Ion

having trouble every now and then when starting , i would let it sit & would start . doing regularly and last night it sat over night else where because it wouldnt start

Asked by for the 2005 Saturn Ion
Is your security light flashing when the car won't start? You may have a fault with the anti-theft system. If so there should be codes stored in the Body Control Module which may lead to the cause of your problem.
2 answers
I had a similar issue with my Saturn and it turned out to be the Pass Lock system. I have found if I lock my steering wheel before getting out that I have issues with starting my car and have to re-set the pass lock system. There is a way to disconnect the Pass Lock system completely, but the light will constantly stay on after that. Try and see if not locking your steering wheel makes a difference.