Ignition Lock Cylinder Guide for 1979-1987 GMC G2500 Vans
Having trouble with your key or starting your G2500? Your ignition lock cylinder might be the culprit.
- Symptoms are almost always mechanical: key sticking, not turning, or getting stuck.
- This is a simple, affordable DIY repair, but it requires a steering wheel puller and a lock plate compressor tool.
- The lock cylinder is separate from the electronic ignition switch on these vans.
- Aftermarket brands like Dorman and Standard Ignition are reliable choices for this part.
Is Your G2500's Ignition Lock Cylinder Failing?
On a classic workhorse like the 1979-1987 GMC G2500, parts wear out. The ignition lock cylinder is no exception. After decades of use, the small metal tumblers inside the cylinder wear down from the constant turning of the key. This wear and tear is the primary cause of failure. If you're experiencing any of the symptoms below, it's a strong sign that this part needs replacement.
Common Symptoms of a Bad Lock Cylinder
- Key is Hard to Insert or Remove: You might feel like you have to jiggle or force the key into the ignition. This happens when the tumblers inside get worn or misaligned.
- Key Won't Turn: The most common problem. You put the key in, but it refuses to turn to the 'ON' or 'START' position. This can leave you stranded.
- Key Gets Stuck: You can start the van, but you can't turn the key back to the 'OFF' position to remove it.
- No 'Click' or Power to Accessories: When you turn the key, you don't get power to the radio or other accessories. This can happen if the worn cylinder isn't properly engaging the ignition switch.
Don't Confuse it With the Ignition Switch
It's important to know that the lock cylinder (where the key goes) and the ignition switch (the electronic part that sends power) are two different components on these vans. If you can turn the key but the engine doesn't crank and the dash lights don't come on, the problem is more likely the ignition switch itself, not the lock cylinder.
Choosing the Right Aftermarket Ignition Lock Cylinder
For a vehicle from this era, finding a new OEM (Original Equipment Manufacturer) part from GM is nearly impossible. The good news is that the aftermarket offers several reliable and affordable options. The basic design of this part is simple and has been produced for millions of GM trucks and vans, so quality is generally consistent.
Brand Tiers for Your G2500
- Standard Ignition (Standard Motor Products): Often considered a premium aftermarket brand, Standard parts are trusted by professional mechanics. They are known for meeting or exceeding original specifications, ensuring a good fit and smooth operation.
- Dorman: A very popular and widely available brand. Dorman is known for creating direct replacement parts that often come with everything needed for the job. They offer a good balance of quality and value, and often carry a lifetime warranty.
- Replacement / Store Brands: These are typically the most budget-friendly options. For a simple, purely mechanical part like the lock cylinder on a G2500, these can be a perfectly acceptable choice for getting your van back on the road without spending much.
Pro Tip: Since you'll be taking apart the steering column, consider replacing the turn signal switch at the same time if it's giving you any trouble. You'll have easy access to it during the lock cylinder replacement.
Estimated Costs
Replacing the ignition lock cylinder is one of the more affordable repairs you can make. The parts are inexpensive, and if you do it yourself, the cost is minimal. Even having a shop do it is relatively cheap.
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Ignition Lock Cylinder | $25 - $47 |
| Shop Labor | $100 - $200 |
| Total (Shop Repair) | $125 - $247 |
Frequently Asked Questions
Is replacing the ignition lock cylinder a difficult job?
No, it's generally considered an easy DIY job for someone with basic tools. However, it does require removing the steering wheel and using a special 'lock plate' removal tool 🎬 See how to replace an ignition cylinder on older GM vehicles., which is inexpensive to buy or can often be rented from auto parts stores. The entire process usually takes about an hour.
🎬 Watch this step-by-step guide on replacing a GM ignition lock cylinder.Do I need to get the new keys programmed?
No. Your 1979-1987 GMC G2500 does not have a transponder or 'chip' key security system. The new lock cylinder will come with a new set of keys that will work immediately after installation. Programming is only required on much newer vehicles.
Will I need two different keys for the door and ignition now?
Yes. After replacing the ignition lock cylinder, the new key that came with it will start your van, but your original key will still be needed to unlock the doors. Some kits may include tumblers that allow a locksmith to re-key the new cylinder to match your original keys.
Are there any recalls on the ignition for my G2500?
No. While GM had major ignition switch recalls in the 2010s, those were for much newer vehicles (mostly from the 2000s) and involved a different type of defect where the key could accidentally turn off while driving. There are no active recalls or specific Technical Service Bulletins (TSBs) for the ignition lock cylinder on the 1979-1987 GMC G-series vans.
Helpful Videos
Technical Specifications
This is a purely mechanical lock cylinder. It does not use a transponder or chip key system. Replacement requires removal of the steering wheel and lock plate.
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.
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your G2500's Ignition Lock Cylinder Failing?
- Common Symptoms of a Bad Lock Cylinder
- Don't Confuse it With the Ignition Switch
- Choosing the Right Aftermarket Ignition Lock Cylinder
- Brand Tiers for Your G2500
- Estimated Costs
- Frequently Asked Questions
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