* Steering Wheel Lock: The steering wheel might be locked. Try gently jiggling the steering wheel while turning the key.
* Faulty Ignition Switch: This is a common culprit. The ignition switch itself might be worn out, broken, or malfunctioning, preventing it from making the proper electrical connections.
* Broken Ignition Cylinder: The part where the key goes might be damaged. This could be from wear and tear, attempted theft, or a manufacturing defect.
* Low Battery: A weak battery might not have enough power to crank the engine, even if the ignition switch is working correctly. Try jump-starting the car.
* Neutral Safety Switch (Automatic Transmission): In automatic transmission models, this switch prevents starting unless the gear selector is in Park or Neutral. Ensure your gear selector is in the correct position.
* Immobilizer System: Many newer vehicles have an immobilizer system that prevents the car from starting unless the correct key is used. If you have a spare key, try that. A faulty immobilizer module is also possible.
* Wiring Issues: Damaged or corroded wiring between the ignition switch and other components (like the starter motor) can prevent the car from starting.
* Starter Motor Problems: The starter motor itself could be faulty and unable to crank the engine. You might hear a clicking sound if this is the case.
* Security System: A malfunctioning aftermarket alarm or security system could be preventing the car from starting.
To diagnose the issue, you'll need to systematically check these possibilities. If you're not comfortable working on cars yourself, it's best to take the GTO to a qualified mechanic for diagnosis and repair.
