A Guide to the Headlight Switch for the 1987 GMC V2500
If your truck's lights are flickering or failing, the headlight switch is a likely culprit.
- Flickering dash lights are a very common first sign that your 1987 V2500's headlight switch is failing.
- Headlights that cut out while driving are a critical safety issue caused by the switch's internal breaker tripping, requiring immediate replacement.
- Replacement is a simple, DIY-friendly job that can be done in under an hour with basic tools.
- Standard Ignition is a reputable aftermarket brand, providing a reliable alternative to OEM parts which are hard to find for this vehicle.
Is Your Headlight Switch Failing?
After decades of use, the headlight switch in a classic 1987 GMC V2500 is a common part to wear out. The internal electrical contacts can corrode, wear down, or overheat from the electrical load of the lights. This can lead to a range of frustrating and dangerous issues. One of the most common early signs is flickering or dimming dashboard lights when you rotate the knob. This points to a bad connection in the part of the switch that controls instrument brightness. You might also find that your headlights or parking lights don't turn on at all, or you have to jiggle the switch to get them to work. In more serious cases, the headlights can cut out intermittently while driving, which is a major safety hazard. This is often caused by an internal circuit breaker in the switch overheating and tripping. A smell of burning plastic or smoke from the switch area is a critical warning sign that the switch is overheating and needs to be replaced immediately.
Choosing the Right Aftermarket Switch
For a 1987 V2500, finding a new original equipment (OEM) part from GM is unlikely. The good news is that the aftermarket offers reliable solutions. You'll typically find two main options:
- Standard Ignition: This is a well-known aftermarket brand that has been producing ignition and electrical components for a long time. They are generally considered a quality choice for daily drivers and restorations, offering a good balance of price and reliability.
- Replacement: This category usually refers to more generic, unbranded, or store-brand parts. While often the most affordable option, quality can be inconsistent. For a critical safety component like a headlight switch, opting for a known brand like Standard Ignition is often worth the small price difference for peace of mind.
Since the electrical load from modern halogen or LED headlights can be higher than the original system was designed for, some owners in forums report that new switches can fail prematurely. However, for a stock 1987 V2500 with standard bulbs, a quality aftermarket switch should provide reliable service.
Headlight Switch Replacement Cost
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Replacement, Standard Ignition) | $31.80 - $58.42 |
| New OEM (GM Genuine / ACDelco) | $43.00 - $65.00 (if found) |
| Shop Labor | $100 - $150 |
Frequently Asked Questions (FAQ)
Can I replace the headlight switch myself?
Yes, this is a very DIY-friendly job on a 1987 GMC V2500. The process involves removing the dash bezel to access the switch, pressing a small button on the switch body to release the knob and shaft, unscrewing a retaining nut, and unplugging the electrical connector. Most owners with basic hand tools can complete this replacement in under an hour.
Why do my dash lights flicker but the headlights work fine?
This is a classic symptom of a failing headlight switch. The part of the switch that controls the dash light brightness (a component called a rheostat) is separate from the contacts that control the headlights. The rheostat often wears out first, causing the flickering you see when you turn the knob.
My headlights turn off and on by themselves while driving. Is that the switch?
This is a very common and dangerous symptom of a bad headlight switch. These switches have an internal thermal circuit breaker. When the switch gets old and corroded, or if there's a short in the wiring, it can overheat, causing the breaker to trip and turn the lights off. Once it cools for a moment, it resets, and the lights come back on, creating a dangerous cycle. Immediate replacement is recommended.
Are there any recalls for the headlight switch on this truck?
No, a search of the National Highway Traffic Safety Administration (NHTSA) database does not show any specific recalls for the headlight switch on the 1987 GMC V2500. Any recalls found for GM vehicles are for much newer models and different issues.
Technical Specifications
OEM Part Numbers: D1506A
Dash-mounted pull-type switch with rotating dimmer. Controls headlights, parking lights, instrument panel lights, and dome light. Features an internal circuit breaker.
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 V2500: