99 Cadillac DeVille states auto theft system/car may not start on dash board and asks me to remove key from ignition and wait 3 minutes then start car. Is there anything wrong or how do I reset this?

You have a problem in the Ignition switch. The switch is wore out. $600.00 to replace! NOT!!!!! The ignition is not sensing the ignition key resistor. To fix this , you will need to sacrifice a key but it is a simple fix to bypass the security system. Remove the steraring colum cover locate the 2 white wires coming down from the ignition switch. Cut them. Solder the wires , From the firewall, onto the resistor in the key. Securley place some shrink tubbe over that. Wire tie this up under the dash securly. You have just bypassed the security system! You can now start your car with a key made by the local hardware. I am going on 2 years with this fix!

You will have to wait the three minutes. During that time clean the key with an alcohol pad. Works for me.

This had happened to me! check out this site your car is on the list for cars effected ... Ask questions they have great customer service and this is something that will save you hundreds of dollars and you can put it in yourself! This is a permanent ix! I did mine 5 years ago and I haven't had a problem since. Hope this helps ya! Do It Yourself GM Security bypass