A Guide to the 1958 Buick Super Trunk Lock Cylinder
If your classic Buick's trunk is getting hard to open, a new lock cylinder is a simple and effective fix.
- A failing trunk lock on a 1958 Buick Super is a common issue due to age and is not related to any recalls or factory defects.
- Replacement is a simple, DIY-friendly job that takes less than an hour with basic tools.
- New aftermarket locks from brands like Standard Ignition are the most practical and reliable solution, as new OEM parts are unavailable.
- The new lock will come with a new set of keys; your original key will no longer work for the trunk.
Is Your Trunk Lock Failing?
After more than 60 years of service, the original trunk lock on your 1958 Buick Super has likely seen better days. The internal components, like pins and tumblers, can wear down, and the entire assembly can become loose. These are common issues for classic cars and are usually signs of normal wear and tear, not a manufacturing defect.
Common Symptoms of a Bad Trunk Lock
- Key is hard to turn or won't go in: Over time, the tumblers inside the lock can get gummed up with dust and grime or simply wear out. While cleaning with a silicone-based lubricant can sometimes help, replacement is often the best long-term solution.
- Lock feels loose or wiggles: The retaining clip holding the cylinder in place can loosen, causing the entire lock to move when you use the key. This makes it difficult to operate and can eventually damage the linkage rod.
- Key spins freely but nothing happens: If the key turns with no resistance but the trunk doesn't open, the small lever on the back of the lock cylinder has likely broken or disconnected from the latch rod.
- Trunk won't open: If the key turns but the trunk remains shut, the connection to the latch is likely the problem. You may need to access the trunk from inside the car, possibly by removing the back seat, to investigate further.
Choosing the Right Aftermarket Trunk Lock
For a vehicle like the 1958 Buick Super, finding a new original equipment (OEM) trunk lock from GM is not a realistic option. The market for these parts consists of New Old Stock (NOS), used, and new aftermarket parts. While NOS parts are original, they are rare, expensive, and may have degraded from decades of storage. Used parts are a gamble, as they may be just as worn as the one you're replacing.
New aftermarket parts are the most practical and reliable choice. Brands like Standard Ignition (also known as Standard Motor Products or SMP) are a common and trusted option. Standard has been making quality replacement parts for over 100 years and is known for producing components that meet or exceed original specifications. Their locks use quality materials like brass tumblers and die-cast zinc cores to ensure smooth operation and durability.
Pro Tip: A new aftermarket trunk lock will come with a new set of keys. Your original key will no longer work for the trunk. This is a good opportunity to check the condition of your door and ignition locks, as you can often buy a matched set if you wish to reduce the number of keys for your car.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard Ignition) | $14.75 - $23.31 |
| New Old Stock (NOS) OEM | $75 - $200+ (if found) |
| Used OEM (from salvage) | $20 - $60 |
| Shop Labor for Installation | $50 - $100 |
Frequently Asked Questions (FAQ)
Is replacing the trunk lock a difficult DIY job?
No, this is a very simple job that most car owners can do in under an hour with basic hand tools. The lock cylinder is typically held in by a retaining clip on the inside of the trunk lid. Once the clip is removed and the linkage rod is disconnected, the old cylinder slides out, and the new one goes in its place.
What tools are needed to replace the trunk lock?
You will likely need a simple set of tools, such as a flathead screwdriver and needle-nose pliers. The replacement process usually involves removing a clip and disconnecting a rod.
Will the new lock work with my original car keys?
No. A new aftermarket trunk lock cylinder will always come with its own set of new keys. You will need to carry a separate key for the trunk after the replacement.
Are there any recalls for the 1958 Buick Super trunk lock?
No. Searches for official recalls or Technical Service Bulletins (TSBs) from GM or the NHTSA for the trunk lock on the 1958 Buick Super show no results. This is expected for a simple mechanical part on a vehicle of this age. Any failure is due to normal wear and tear over many decades.
What's the difference between the lock cylinder and the latch?
The lock cylinder is the part you put your key into. The latch is the mechanism inside the trunk that actually holds the trunk lid closed. The lock cylinder connects to the latch with a small metal rod to operate it. Before ordering a new lock, it's wise to confirm the latch itself isn't the problem.
Technical Specifications
Mechanical lock cylinder with linkage arm.
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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.