Chevrolet P20 Van Headlight Switch Guide for 1968-1974 Models
Everything you need to know about choosing the right new headlight switch for your classic P20 van.
- A failing headlight switch is a critical safety issue; replace it immediately if lights are unreliable.
- Symptoms include flickering lights, total failure, a burning smell, or inability to change modes.
- Replacement is simple for DIYers and requires basic tools, usually taking less than an hour.
- Standard Ignition is a recommended aftermarket brand for quality and durability, while Replacement is a budget-friendly option.
Is Your P20 Van Headlight Switch Failing?
The headlight switch on these classic Chevrolet vans is a mechanical part with internal electrical contacts that can wear out or corrode over time. A failure can leave you without crucial lights when you need them most. Watch for these common signs that your switch is going bad.
- Lights Don't Turn On: The most obvious symptom is when your headlights or taillights fail to turn on at all.
- Flickering Lights: Headlights that flicker or cut out intermittently while driving often point to a worn switch.
- Can't Switch Modes: You may find the switch works in one position (like parking lights) but not another (headlights), or you can't switch between high and low beams.
- Burning Smell: A distinct plastic or electrical burning smell coming from the dashboard area is a serious warning sign that the switch is overheating and needs immediate replacement.
- Dash Lights Malfunction: If you can no longer dim or brighten your instrument panel lights by twisting the knob, the switch's internal rheostat has likely failed.
Choosing the Right Aftermarket Headlight Switch
For a vehicle from this era, new original equipment (OEM) switches from GM are no longer produced. The market consists of aftermarket replacements that vary in quality and price. The two main brands available are Standard Ignition and Replacement.
Brand Tiers: Standard vs. Replacement
- Standard Ignition (Standard Motor Products): This is a well-known and respected aftermarket brand that produces parts designed to meet or exceed original specifications. Many professional mechanics trust SMP for its reliability and proper fit. Their switches often use quality materials like copper alloy conductors for better performance. This is a solid choice for a durable, long-lasting repair.
- Replacement: This is a value-oriented brand that offers parts at a lower price point. These switches are designed to be a direct fit and will restore function, making them a good option for budget-conscious repairs. While they meet basic requirements, they may not have the same long-term durability as a premium brand like Standard Ignition.
Headlight Switch Replacement Cost (1968-1974 P20 Van)
Replacing the headlight switch is an affordable repair. The job is straightforward and doesn't require many hours of labor.
| Part Type | Part Cost | Shop Labor Cost | Total Estimated Cost |
|---|---|---|---|
| New Aftermarket | $27.74 - $58.42 | $75 - $150 | $102.74 - $208.42 |
| New OEM (NOS) | Not Widely Available | $75 - $150 | N/A |
Cost estimates are based on national averages for parts and labor and may vary by location and repair shop.
Frequently Asked Questions
Is it difficult to replace the headlight switch myself?
No, this is a very DIY-friendly job for most owners. It typically involves disconnecting the battery, removing the dash trim panel, pressing a release button on the switch to remove the knob, unscrewing a retaining nut, and unplugging the electrical connector. The entire process usually takes less than an hour with basic hand tools.
Are there any recalls for the P20 van headlight switch?
No recalls or technical service bulletins (TSBs) were found for the headlight switch on the 1968-1974 Chevrolet P20 Van in the NHTSA database. Failures are typically due to the age and wear of the component.
Do I need a special tool to remove the headlight knob?
No special tool is needed. On these GM switches, there is a small, spring-loaded button on the body of the switch itself, located behind the dashboard. You pull the headlight knob all the way out, reach under the dash, press the button, and the knob and shaft will slide out completely.
My headlights don't work, but my taillights do. Is it the switch?
It's very likely the headlight switch. The switch has separate internal contacts for the parking/tail lights and the headlights. If one set works and the other doesn't, the switch has partially failed. However, it's also wise to check the floor-mounted dimmer switch, as it can also cause headlight failure.
Technical Specifications
OEM Part Numbers: 1995164 1995179 1995122 1995147
Push-Pull Type, 8-Terminal Connector
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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.