What is the low beam headlight bulb size for a 1999 GMC K1500?

The 1999 GMC K1500 uses a 9006 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1999 GMC K1500?

The high beam bulb size for the 1999 GMC K1500 is 74.

Why are my 1999 GMC K1500 headlights dim?

Dim headlights on a 1999 GMC K1500 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9006 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1999 GMC K1500 fog light?

The 1999 GMC K1500 uses a 880 LED bulb for the fog light position.

Is the 1999 GMC K1500 single or dual beam?

The 1999 GMC K1500 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1999 GMC K1500?

Yes, the 1999 GMC K1500 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9006 LED LED conversion kit for the low beams.

Does the 1999 GMC K1500 have fog lights?

Yes, the 1999 GMC K1500 takes a 880 LED bulb for the fog light position.

Did the 1999 GMC K1500 change headlight bulb sizes from the previous year?

Yes — the 1999 GMC K1500 uses different bulb sizes than the 1998 model. The 1999 generation introduced this bulb configuration.

Is the 1999 GMC K1500 the first or last year to use 9006 LED bulbs?

The 1999 GMC K1500 is the only year in the 1999 generation to use the 9006 LED bulb for the low beam headlight.

How do I change the headlight on a 1999 GMC K1500?

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 9006 LED 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 1999 GMC K1500?

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 9006 LED 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 1999 GMC K1500 headlights?

A pair of halogen 9006 LED 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 1999 GMC K1500?

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 9006 LED position are available as direct plug-and-play replacements.

The 1999 GMC K1500 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1999 GMC K1500

What Size Bulbs Does a 1999 GMC K1500 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 1999 GMC K1500 Have?

Lighting on the 1999 GMC K1500 is managed by a total of 15 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9006 LED low beam and 74 high beam bulbs for precise light distribution. This model belongs to the late years of the K1500's 1979-1999 production span.

Can You Put LED Bulbs in a 1999 GMC K1500?

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 9006 LED low beams, as they see the most use. Adding a matching 74 LED kit later will complete the look and ensure consistent lighting performance. Don't forget the 880 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1999 GMC K1500 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9006 LED	Buy 9006 LED →
High Beam	74	Buy 74 →
Fog Light	880 LED	Buy 880 LED →
Brake Light	74	Buy 74 →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	3157NA LED	Buy 3157NA LED →
Turn Signal Rear	3157 LED	Buy 3157 LED →
Reverse Light	3156	Buy 3156 →
Dome Light	211-2	Buy 211-2 →
License Plate	194	Buy 194 →
Map Light	168 or 578	Buy 168 or 578 →
Parking Light	3157NA	Buy 3157NA →
Trunk Light	912	Buy 912 →
Daytime Running	3157CK	Buy 3157CK →
Tail Light	3157	Buy 3157 →

How do the 1999 GMC K1500's bulbs compare to other years?

The 1999 GMC K1500 changed bulb sizes from 1998. The previous model year used a different configuration.

This bulb configuration covers the 1999 model years. ← 1998

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Other K1500 Years

1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1985 1984 1983 1982 1981 1980 1979

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