1991 Chevy Camaro

No, it is likely equipped with Passkey security system and will not start without the module seeing the proper resistance.

If your old key had a pellet in it, then you are going to either have to replace the ignition switch and passkey module or use the following method to bypass the key sensor.

You would need a digital ohmmeter to measure the resistance of the pellet in the key. Now go to Radio Shack and buy a resister of the exact same value as the key pellet. Go to the base of the steering column and locate the two thin white wires that go up to the sensor. Cut the two wires and solder the resister between the two ends coming from the harness. This will permanently bypass the sensor but not the rest of the system.