Chevrolet Impala Ignition Lock Cylinder Guide for 1978-1986 Models
If your key is stuck or won't turn, this guide is for your 1978-1986 Impala.
- Symptoms like a stuck or hard-to-turn key are the main sign of failure and should be addressed before you get stranded.
- Replacement is a straightforward, DIY-friendly job for this Impala generation, requiring a few special tools that can be rented.
- A new cylinder comes with new keys; your old key will no longer start the car.
- ACDelco is the premium brand choice for durability, while Standard Ignition and Dorman offer a good balance of quality and price.
Is Your Impala's Key Giving You Trouble?
If you own a 1978-1986 Chevrolet Impala, you know it's a durable, straightforward car. But after decades of use, some parts just wear out. The ignition lock cylinder is one of them. Years of inserting and turning your key eventually wears down the small metal parts inside the cylinder. If your key is suddenly hard to turn, gets stuck, or won't start the car at all, the lock cylinder is the most likely culprit.
Common Symptoms of a Failing Ignition Lock Cylinder
- Key is Difficult to Turn: You have to jiggle or force the key to get it to turn to the 'On' or 'Start' position. This is a classic sign of worn internal tumblers.
- Key Gets Stuck: The key goes in but is difficult or impossible to remove. It might also get stuck in the 'Accessory' or 'On' position.
- Car Won't Start: You turn the key and nothing happens, or you only hear a click. If the battery and starter are good, the lock cylinder may not be making proper contact with the ignition switch behind it.
- No Power to Accessories: The car may start, but the radio, wipers, or other electrical components don't work because the cylinder isn't fully engaging the 'Accessory' or 'On' position.
Don't Get Stranded
These symptoms usually get worse over time. A key that is a little sticky today might refuse to turn at all tomorrow, leaving you stranded. It's best to address this issue as soon as it appears.
Choosing the Right Aftermarket Ignition Lock Cylinder
For a classic vehicle like the 1978-1986 Impala, you have several good aftermarket options. Since these models don't have electronic anti-theft keys, the replacement is simpler and more affordable than on modern cars.
Brand Quality Tiers
- Premium Aftermarket (ACDelco): ACDelco is General Motors' own parts brand and is often the same as the original factory part. Choosing ACDelco gives you the highest confidence in fit, finish, and long-term durability. It's the top choice if you want a set-it-and-forget-it repair.
- Quality Aftermarket (Standard Ignition, Dorman): Brands like Standard Motor Products and Dorman are trusted by many professional mechanics. Standard Ignition has a long history of making reliable electronic and ignition parts. Dorman is known for providing cost-effective solutions that often match OE function. For this specific part, both are solid choices that balance cost and quality.
- Budget Aftermarket (Replacement): These are the most affordable options. While they will get your car running, their internal components may not be as durable as premium brands. They can be a good choice for a car that isn't driven daily, but for a primary vehicle, spending a little more on a known brand is often worth it.
How Much Does a New Ignition Lock Cylinder Cost?
The cost to replace the ignition lock cylinder on a 1978-1986 Impala is very reasonable. The part itself is affordable, and the labor is straightforward for a professional or an experienced DIYer.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Part | $26.96 - $80.26 |
| Shop Labor | $100 - $200 |
| Total Professional Replacement | $127 - $281 |
Pro Tip: Check Your Door Locks
Your new ignition lock cylinder will come with a new set of keys. This means your old keys will no longer start the car. If you want one key for both the ignition and the doors, now is a good time to buy a matching lock set that includes the ignition and both door lock cylinders.
Frequently Asked Questions (FAQ)
Can I replace the ignition lock cylinder myself?
Yes, this is a very manageable DIY job for someone with basic tools and patience. The process involves removing the steering wheel and using a steering wheel lock plate tool to access the cylinder. Several online videos show the process for older GM cars, which is nearly identical to the Impala.
What special tools do I need?
Besides basic screwdrivers and a socket set, you will need a steering wheel puller and a lock plate compressor tool. These can often be rented for free from auto parts stores.
Will my old key work with the new cylinder?
No. The new ignition lock cylinder is a complete assembly with new internal tumblers and comes with its own set of keys. You will have to use the new keys to start the car. Your old keys will still be needed for the doors and trunk unless you replace those locks as well.
Why did my original lock cylinder fail?
Failure is almost always due to simple wear and tear. After 40+ years and countless key turns, the metal pins (tumblers) and the key itself wear down. A heavy keychain can also put extra stress on the cylinder, accelerating wear.
Are there any recalls on the 1978-1986 Impala ignition?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no open recalls for the ignition lock cylinder on this specific generation of Chevrolet Impala. The well-known GM ignition switch recalls from the 2010s affected much newer models, primarily from the 2000s.
Technical Specifications
OEM Part Numbers: 19356477
Mechanical ignition lock cylinder for vehicles with column-mounted ignition. Does not require key programming.
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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.
- 🛍️ Shop This Part
- Is Your Impala's Key Giving You Trouble?
- Common Symptoms of a Failing Ignition Lock Cylinder
- Don't Get Stranded
- Choosing the Right Aftermarket Ignition Lock Cylinder
- Brand Quality Tiers
- How Much Does a New Ignition Lock Cylinder Cost?
- Pro Tip: Check Your Door Locks
- Frequently Asked Questions (FAQ)
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