You just replaced the steering wheel column of your 1999 Chevy Tahoe now your car won't start It turns over and the security light is on But it won't start Anyone have any ideas?

It sounds like your Tahoe's anti-theft system may have been triggered during the steering column replacement. When the security light is on and the engine won't start, it usually indicates that the vehicle is in "lockout" mode. Try using your key fob to lock and unlock the doors, or leave the key in the "on" position for about 10-15 minutes to reset the system. If that doesn't work, you may need to check the connections or wiring related to the ignition and anti-theft system.