* Passlock System: This is the most common system in 1998 Silverados. It involves a chip in the ignition key that communicates with the vehicle's computer. If the chip isn't recognized, the engine won't crank. There's no reset button. Problems are usually solved by:
* Getting a new key programmed: This is the most likely solution. A locksmith or dealership can program a new key that will work with your vehicle's Passlock system.
* Checking the battery: A weak battery can sometimes cause Passlock issues.
* Aftermarket Systems: Your truck may have an aftermarket alarm or immobilizer installed in addition to (or instead of) the factory system. These systems have their own procedures and may require a code to disable them. Check your owner's manual (if you have it) or any documentation that came with the aftermarket system.
* Other potential problems: Problems mimicking anti-theft can also stem from other issues, such as:
* Neutral Safety Switch: If the vehicle isn't in Park or Neutral, the engine won't start.
* Battery Issues: As mentioned above, a weak or dying battery can cause all sorts of electrical problems.
* Faulty Ignition Switch: A failing ignition switch can prevent the engine from starting.
What to do:
1. Check your owner's manual: This is the best place to start. It should describe the anti-theft system in your specific vehicle.
2. Try a spare key: If you have a spare key, try using that. If the spare works, it points to a problem with your primary key.
3. Check the battery: Make sure your battery is fully charged.
4. Have it professionally diagnosed: If you've tried the above steps and still can't start your truck, take it to a locksmith or a reputable mechanic specializing in GM vehicles. They'll be able to diagnose the problem accurately and provide the appropriate solution. Trying to bypass or "reset" the system incorrectly could damage your vehicle's electronics.
Avoid online instructions promising easy "resets" unless they specifically relate to the Passlock system and are from a trustworthy source. Many such instructions are unreliable and could harm your vehicle.
