My 2004 saturn ion won't start when its cold I even have a block heater to plug it in and it won't start

The anti theft wire under the steering column gets to cold and locks out ignition. i just found the auto theft wire and disconnected it. or you can take a blow dryer or heat gun run under the steering column for 3-5 minutes. if you do disconnect the auto theft wire you must do it while the car is running. use the blow dryer method, start the car then disconnect the auto theft wire.