How to reset passlock on a 2005 Ion - 2003 Saturn ION

You may need a locksmith to recode the passlock system.

Passlock cannot be disabled. This is your life now, you must obey the computer.

But srsly, how do you know that is the problem? Have you scanned for DTC's?

A common problem on the ION is a faulty ignition switch.

is there an easy way to reset the passlock

Go to this link for a few ways to get thru the infamous Passlock problem.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

it has to be done at a gm dealer

I had this problem on cold mornings mostly. If it doesn't start and you have power and there is a yellow light on the panel that looks like a padlock the problem is most definitely the ignition switch. The ignition switch will falsely trigger the passive anti-theft devise "Passlock" to disable the engine. Several minutes later if you sit and watch the light it will go off indicating that Passlock has reset. If you then remove the key and try it again the car should start. This problem gets really irritating if you don't deal with it. My car did it so randomly in the winter that I only got it fixed after it happened twice in a row after resetting and only started on the third try. Took about half an hour. I was really late for work that day.

Sorry the saturn's do not have a inertia switch. But more information would help. Like does the security light activate on the dash, you may have a bad Passlock, Place the ignition key to the on possition for 10 min and then try starting it. 
Good luck and let me know how things are going. There should be instructions in your manual on how to get the car started if the Passlock is giving you problem.

Your ignition switch needs to be replaced and then your PassLock needs to be re-learned. Very common problem on the Ions.

Probably something shorting out. This is something that probably isn't going to be easy to figure out. You need someone that can diagnose it in person

It is a common problem on Saturn Ion... You have to replace the pass lock switch. The cost of the part is around $65.00 cdn. It is located behind the key switch.