A Guide to the 1994-2004 Buick Regal Ignition Lock Cylinder
Is your Regal failing to start or is the key getting stuck? Your ignition lock cylinder might be the culprit.
- The most common failure is not mechanical but electrical, related to the Pass-Key II anti-theft system wires inside the cylinder.
- A 'No Crank' with a 'Flashing Security Light' is the primary symptom to watch for.
- Replacement is simple if you have a working key, but requires drilling if all keys are lost.
- You must either reuse your old key by recoding the new cylinder or perform a 30-minute security relearn procedure for a new key.
Common Failure Symptoms
A failing ignition lock cylinder in a 1994-2004 Buick Regal often presents very specific symptoms, many of which are tied to the vehicle's anti-theft system. Being aware of these signs can help you diagnose the problem correctly.
- No Crank and Flashing Security Light: 🎬 Watch: How to fix a flashing security light and no-crank. This is the most common and definitive symptom. You'll turn the key, the dashboard lights will come on, but the engine won't crank at all, and the "SECURITY" light will be flashing or stay on solid. This is a classic sign that the lock cylinder's internal wires have failed and the Pass-Key II system has immobilized the engine.
- Key is Difficult to Turn or Remove: The key may feel like it's binding, catching, or requires wiggling to turn between the OFF, ACC, and ON positions. Over time, the mechanical tumblers inside the cylinder wear out. You might also find the key gets stuck and cannot be removed, which can sometimes be related to the shifter interlock mechanism rather than the cylinder itself.
- Intermittent Starting: Your Regal may start perfectly one day and refuse to start the next. This often happens when the internal wires are beginning to break, causing an intermittent connection.
- Issues Powering Accessories: As the cylinder wears, you might find that certain key positions don't work correctly. For example, turning to the 'ACC' position may not power on the radio as it should.
Is It Part of the GM Ignition Recall?
Yes, the 2004 model year Regal was included in a 2014 GM recall. This recall addressed a faulty ignition switch (the electronic part behind the cylinder) that could cause the car to stall while driving, and a faulty lock cylinder that could allow the key to be removed when not in Park. While related, this is a separate issue from the common Pass-Key anti-theft system failure. Check your VIN with the NHTSA to see if your vehicle was affected and if the recall work was completed.
Choosing the Right Aftermarket Ignition Lock Cylinder
When your original lock cylinder fails, you have several aftermarket options. The most important factor for the Buick Regal is how the new part accommodates the Pass-Key II system. Aftermarket cylinders do not come pre-coded for your specific key resistor.
Brand Quality Tiers
- ACDelco: As the original equipment (OE) supplier for GM, ACDelco parts are generally considered the benchmark for fit and quality. They offer both "GM Genuine" parts (identical to the factory original) and a "Professional" line, which is their high-quality aftermarket offering. For a part this critical, ACDelco is a reliable choice.
- Standard Ignition (SMP): Standard Motor Products is a highly respected aftermarket manufacturer with a long history of producing reliable electronic and engine management parts. Their components are trusted by professional technicians and are considered an excellent alternative to OE parts, often meeting or exceeding original specifications.
- Dorman: Dorman is a well-known brand that specializes in providing aftermarket solutions, sometimes with design improvements over the original part. They offer a wide range of parts and even provide helpful installation videos. While some mechanics have mixed opinions on consistency, Dorman is a major player and a viable option.
- Replacement / Store Brands: These are the most budget-friendly options. While they can get your car running, they may not have the same long-term durability or precision machining as premium brands. Given the complexity of the Pass-Key system and the labor involved, investing in a higher-quality brand is often recommended.
A Note on Keys and Recoding
When you buy a new aftermarket lock cylinder, it will come with a blank, temporary key. You have two main paths: 1) A locksmith or mechanic can disassemble your old cylinder and the new one, transferring the original tumblers to the new cylinder. This allows you to reuse your existing, resistor-equipped key and requires no security relearn procedure. 2) You can have a new Pass-Key blank cut to match your old key, then perform a 30-minute vehicle security relearn procedure.
Estimated Replacement Costs
The cost to replace your ignition lock cylinder can vary significantly based on whether you can do it yourself and the parts you choose. The most significant cost factor is if you have lost all your keys, as this requires a technician to drill out the old cylinder.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Lock Cylinder | $28 - $224 |
| Shop Labor | $123 - $181 |
| Total Estimated Cost (DIY) | $28 - $224 |
| Total Estimated Cost (Installed) | $151 - $405 |
Frequently Asked Questions
Can I replace the ignition lock cylinder myself?
Yes, if you have a working key, the replacement is a straightforward DIY job for many people. The process involves removing the steering column shrouds, turning the key to the 'ON' position, and pressing a release tab to pull the cylinder out. 🎬 See this full replacement tutorial for Regal and Century models. However, if you have no key, the job becomes much harder as it requires drilling out the old cylinder, which is best left to a professional.
Do I need to program a new key after replacing the cylinder?
It depends. If you transfer the tumblers from your old cylinder to the new one to reuse your original key, no programming is needed. If you use a new key with the new cylinder, you must perform a security relearn procedure, which typically takes about 30 minutes and involves cycling the key in the ignition.
🎬 Watch: How to perform the 30-minute security relearn procedure.What is the Pass-Key II system and why does it cause problems?
Pass-Key II is GM's anti-theft system from this era. It uses a key with a small resistor pellet. The ignition lock cylinder has contacts that read this resistor. The most common failure is the thin wires connecting these contacts break from years of use, causing the car to think it's being stolen and disabling the engine.
My key is stuck. Is it always the lock cylinder?
Not always. On many GM vehicles of this period, a stuck key can be caused by a problem with the automatic transmission shifter. A faulty wire or switch in the shifter assembly can prevent the car from recognizing that it is in Park, which in turn prevents the key from being released.
Helpful Videos
Technical Specifications
Compatible with GM Pass-Key II Anti-Theft System. Requires either recoding to original key or a security relearn procedure upon installation.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Buick Regal: