If your Firebird *does* have traction control (check your owner's manual or sticker on the door jamb), there's typically a button on the dash, often marked with a symbol resembling a car skidding, that will deactivate it. The exact location and appearance of the button may vary slightly. Consult your owner's manual for the precise location and instructions.
If you can't find a button and are certain your car has traction control, it might be a system that disengages only under certain driving conditions or at higher speeds. Again, your owner's manual is the best resource.