1987 GMC V1500 Ignition Lock Cylinder: A Mechanic's Guide
If your key is sticking or won't turn, it's likely time to replace your ignition lock cylinder.
- Failure is common due to age and wear, with symptoms like a key that won't turn or feels sloppy.
- Replacement requires special tools like a steering wheel puller and lock plate compressor.
- There are no recalls for this part on your truck; failure is due to normal wear and tear.
- Choosing a quality aftermarket brand like Standard Ignition can prevent having to do the job again soon.
Is Your Ignition Lock Cylinder Failing?
On a classic truck like the 1987 GMC V1500, the ignition lock cylinder is a common wear item. After decades of use, the small metal tumblers and springs inside the cylinder wear down. This can cause a variety of frustrating symptoms that can leave you stranded.
Key Symptoms of a Bad Ignition Lock Cylinder:
- Key Won't Turn: The most common failure. The key may go in but refuses to turn to the 'On' or 'Start' position. You might have to jiggle or wiggle the key to get it to work.
- Key is Hard to Insert or Remove: Worn tumblers can create a gritty or resistant feeling when you use the key.
- No 'Click' or Spring-Back from 'Start': When you let go of the key after starting the engine, it should spring back to the 'On' position. If it doesn't, the cylinder is failing.
- Lock Doesn't Engage: You can remove the key, but the ignition can still be turned, sometimes even allowing the truck to be started without a key. This is a serious security issue.
Ignition Cylinder vs. Ignition Switch
It's important to know the difference. The lock cylinder is the mechanical part your key goes into. The ignition switch is an electronic component further down the steering column that the cylinder operates via a connecting rod. If your lights and accessories don't turn on at all when the key is in the 'On' position, but the key turns fine, the problem may be the switch, not the cylinder.
Choosing the Right Aftermarket Ignition Cylinder
For a 1987 V1500, original OEM parts are no longer produced. The market consists of aftermarket brands with varying levels of quality. Since replacing the cylinder requires taking apart the steering column, it's worth choosing a quality part to avoid doing the job twice.
| Brand Tier | Brands | Quality & Cost Assessment |
|---|---|---|
| Professional Grade | Standard Ignition (SMP), ACDelco | Often considered OEM-equivalent or better. These brands are known for durability and precise fitment. They are a reliable choice for owners who want a long-term solution. Expect to pay a bit more. |
| Standard Aftermarket | Dorman | Dorman is a widely available brand that offers a balance of affordability and decent quality. It's a popular choice for DIY repairs and generally fits and functions correctly, though some forum users have reported occasional premature failures with lower-cost aftermarket parts in general. |
| Value / Economy | Replacement, Unbranded | These are typically the cheapest options, often found on sites like eBay. While the low price is tempting, the quality can be inconsistent. They might work fine, but there's a higher risk of poor fitment or early failure. |
Pro Tip: Consider a Full Lock Set
If your door locks are also worn, you can often buy a complete set that includes the ignition cylinder and both door lock cylinders, all keyed alike. This is a convenient way to refresh your truck's security with a single key for everything.
Frequently Asked Questions (FAQ)
Do I need special tools to replace the ignition lock cylinder?
Yes. To access the cylinder, you must remove the steering wheel. This requires a steering wheel puller and a lock plate compressor tool. These can often be rented from auto parts stores.
Will a new ignition cylinder come with keys?
Yes, all new aftermarket ignition lock cylinders come with a new set of two keys. You cannot use your old keys with the new cylinder.
Are there any recalls on the 1987 GMC V1500 ignition?
No. There are no open recalls or technical service bulletins (TSBs) from NHTSA or GMC for the ignition lock cylinder on the 1987 V1500. The well-known GM ignition switch recalls from the 2010s affected much newer cars with different systems and do not apply to this truck.
Can I just spray lubricant in the lock?
You can try spraying a dry graphite lubricant into the keyhole as a temporary measure. Some owners report this helps for a short time. However, it will not fix worn-out internal parts and should not be considered a permanent repair.
Technical Specifications
Mechanical, non-transponder key system. Located in the steering column.
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.
- GMC V1500: