Diagnosing and Replacing the Ignition Switch on a 1967 Chevrolet K20 Panel
If your classic K20 Panel has starting problems or stalls unexpectedly, the ignition switch is a likely culprit.
- A failing ignition switch is a common cause of no-start conditions and dangerous stalling in a 1967 K20 Panel.
- Symptoms often include flickering dash lights, intermittent accessory function, and the engine dying when you hit a bump.
- Replacement is a straightforward DIY task that can be completed in about an hour with basic tools.
- Always inspect the wiring connector for melting or damage, as it may need to be replaced along with the switch.
Is Your K20 Panel's Ignition Switch Failing?
After decades of use, the internal metal contacts inside the ignition switch on a 1967 K20 Panel can wear down, corrode, or overheat. This leads to poor electrical connections that can cause a variety of frustrating and sometimes dangerous issues. If your truck is suddenly hard to start, stalls, or has flickering lights, the ignition switch should be one of the first parts you check.
Common Symptoms of a Bad Ignition Switch
- No-Start or No-Crank: You turn the key and nothing happens, or you only hear a single click. This means the switch isn't sending power to the starter.
- Stalling While Driving: The engine may cut out unexpectedly, especially when you hit a bump or jiggle the keys. This is a serious safety hazard, as it also causes a loss of power steering.
- Flickering Lights & Accessories: The dashboard lights, radio, or heater fan may not work correctly or may cut in and out. This happens when the 'Accessory' or 'Run' contacts inside the switch are failing.
- Starts and Immediately Dies: The engine might fire up when you're holding the key in the 'Start' position but die as soon as you let it return to 'Run'.
- Key is Hard to Turn: While often related to the lock cylinder, binding can also be a sign of a problem with the switch itself.
- Visible Damage: In some cases, you may find melted wires or a melted plastic connector at the back of the switch, often caused by previous owners adding accessories that draw too much power through the original circuit.
Recalls and Technical Service Bulletins (TSBs)
There are no specific recalls or TSBs from the National Highway Traffic Safety Administration (NHTSA) for the ignition switch on the 1967 Chevrolet K20 Panel. Major GM ignition switch recalls from the 2010s were for modern cars and do not apply to this classic truck series.
Choosing the Right Aftermarket Ignition Switch
For a 1967 vehicle, finding a "New Old Stock" (NOS) OEM part is nearly impossible and often unnecessary. High-quality aftermarket parts are readily available and provide excellent performance. The key is to choose a reputable brand.
- Standard Ignition (Standard Motor Products): Standard is a well-respected brand in the aftermarket industry, known for producing reliable parts that meet or exceed original specifications. For a critical component like the ignition switch, a Standard Ignition part is a dependable choice that ensures proper function and longevity.
Pro Tip: When replacing the switch, always inspect the wiring connector. After decades of heat and use, the plastic can become brittle and the terminals can corrode. If the connector shows any signs of melting or damage, it should be replaced at the same time as the switch to prevent future problems.
Replacement Cost
| Part Type | Price Range |
|---|---|
| New Aftermarket (e.g., Standard Ignition) | $55 - $60 |
| Shop Labor | $100 - $200 |
Frequently Asked Questions (FAQ)
Is it hard to replace the ignition switch on a '67 K20 Panel?
No, this is a very DIY-friendly job for someone with basic tools. The switch is located on the back of the dashboard and is relatively easy to access. The process involves disconnecting the battery, removing the lock cylinder, unscrewing the bezel nut, and unplugging the switch from underneath the dash. Estimated time is under an hour.
Do I need any special tools?
You will need basic hand tools and potentially a special bezel nut tool, though careful use of other tools can work. To remove the lock cylinder, you'll need a straightened paperclip or a similar small wire to depress the release pin.
My key is stuck or hard to turn. Is that the switch?
It could be, but it's more likely the ignition lock cylinder where you insert the key. These two parts work together but are sold separately. If the key is physically hard to turn or gets stuck, the lock cylinder is the first part to inspect. If you have electrical problems like stalling or a no-start, the ignition switch is the more likely cause.
Why won't my truck shut off even when I take the key out?
This can be a symptom of a faulty ignition switch that is stuck internally in the 'run' position, continuing to supply power to the engine's ignition circuit.
Technical Specifications
Dash-mounted electrical switch, activated by the ignition lock cylinder.
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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.