My 2002 Pontiac grand am will turn over but will not start

My brother's 02 grand am 2.2L would not start. Car has spark, fuel pump works,
good battery, plugs and plug boots new, new fuse for the fuel pump in the fuse block under the hood, everything seems to work but car won't start, crank sensor fine timing chain fine etc... The problem was a security issue. Security light on dash was blinking when trying to start the car but car won't start. The fix for me was Attempt to start the car by turning the key to the Start/Run Position.
Observe that the vehicle fails to start and that the security light is blinking.
Release key to the 'ON/Accessory' Position. (DO NOT turn key to the 'off' position.)
Allow the vehicle to sit with the key in the 'ON/Accessory' Position for no less than 12 minutes.
Turn key to off position and allow the vehicle to remain in the 'OFF' position for no less than 30 seconds. Then try to start the car. I was surprised this worked for me. 2002 pontiac grand am 2.2L. Hope this helps for you folks.