I put a new radio in my 2002 Monte Carlo ss. My lights started flashing my message center don’t not work so I’m assuming it’s the security anti-theft system. The car does not start at all how would I by-pass the anti-theft to get car to start!!?? Please help

 

I did not think removing the factory radio would trigger the vehicle theft system (which last I knew only prevented the car from starting, did not flash the lights; don't quote me on that). Any chance you put the original radio back in to see what it will do? Also, without the message center working, you are flying a bit blind (if the security system had an issue, that is where it would show up).