What is the low beam headlight bulb size for a 1989 GMC S-15?

The 1989 GMC S-15 uses a H6054 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1989 GMC S-15?

The high beam bulb size for the 1989 GMC S-15 is N/A.

Why are my 1989 GMC S-15 headlights dim?

Dim headlights on a 1989 GMC S-15 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H6054 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1989 GMC S-15 fog light?

The 1989 GMC S-15 typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 1989 GMC S-15 single or dual beam?

The 1989 GMC S-15 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1989 GMC S-15?

Yes, the 1989 GMC S-15 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H6054 LED conversion kit for the low beams.

Did the 1989 GMC S-15 change headlight bulb sizes from the previous year?

No — the 1989 GMC S-15 uses the same bulb sizes as the 1988 model. This configuration has been consistent across the 1988–1992 generation.

How do I change the headlight on a 1989 GMC S-15?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old H6054 bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 1989 GMC S-15?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved H6054 LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 1989 GMC S-15 headlights?

A pair of halogen H6054 bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 1989 GMC S-15?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the H6054 position are available as direct plug-and-play replacements.

The 1989 GMC S-15 shares its bulb sizes with the 1988–1992 generation.

Fitment Guaranteed for 1989 GMC S-15

What Size Bulbs Does a 1989 GMC S-15 Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 1989 GMC S-15 Have?

Lighting on the 1989 GMC S-15 is managed by a total of 4 bulbs, covering everything from primary headlights to signal indicators. It features a standard lighting system powered by a dual-bulb halogen configuration using separate H6054 low beam and high beam bulbs for precise light distribution. This model belongs to the mid years of the S-15's 1982-1992 production span.

Can You Put LED Bulbs in a 1989 GMC S-15?

For a GMC built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the H6054 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance.

1989 GMC S-15 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H6054	Buy H6054 →
Side Marker	194	Buy 194 →
License Plate	194	Buy 194 →
Reverse Light	1156	Buy 1156 →

How do the 1989 GMC S-15's bulbs compare to other years?

The 1989 GMC S-15 uses the same bulbs as the 1988 model.

The 1990 model continues with the same bulb sizes.

This bulb configuration covers the 1988–1992 model years. ← 1988 1990 →

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Other S-15 Years

1992 1990 1988 1986 1985 1983 1982

Other Vehicles That Use H6054 Bulbs

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