What is the low beam headlight bulb size for a 1999 GMC Sierra 1500?

The 1999 GMC Sierra 1500 uses a 9006 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 Sierra 1500?

The high beam bulb size for the 1999 GMC Sierra 1500 is 9005.

Why are my 1999 GMC Sierra 1500 headlights dim?

Dim headlights on a 1999 GMC Sierra 1500 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 conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1999 GMC Sierra 1500 fog light?

The 1999 GMC Sierra 1500 uses a 880 bulb for the fog light position.

Is the 1999 GMC Sierra 1500 single or dual beam?

The 1999 GMC Sierra 1500 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 Sierra 1500?

Yes, the 1999 GMC Sierra 1500 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9006 LED conversion kit for the low beams.

Does the 1999 GMC Sierra 1500 have fog lights?

Yes, the 1999 GMC Sierra 1500 takes a 880 bulb for the fog light position.

How do I change the headlight on a 1999 GMC Sierra 1500?

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 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 Sierra 1500?

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 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 Sierra 1500 headlights?

A pair of halogen 9006 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 Sierra 1500?

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

The 1999 GMC Sierra 1500 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1999 GMC Sierra 1500

What Size Bulbs Does a 1999 GMC Sierra 1500 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 Sierra 1500 Have?

Owners of the 1999 GMC Sierra 1500 will find a total of 13 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9006 low beam and 9005 high beam bulbs for precise light distribution.

Can You Put LED Bulbs in a 1999 GMC Sierra 1500?

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 low beams, as they see the most use. Adding a matching 9005 LED kit later will complete the look and ensure consistent lighting performance. Don't forget the 880 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1999 GMC Sierra 1500 Bulb Size Chart

Position	Bulb Size	Shop
Daytime Running	3157CK	Buy 3157CK →
Side Marker	194	Buy 194 →
Turn Signal Front	3157CK	Buy 3157CK →
Low Beam	9006	Buy 9006 →
Fog Light	880	Buy 880 →
High Beam	9005	Buy 9005 →
Brake Light	3157CK	Buy 3157CK →
Turn Signal Rear	3157	Buy 3157 →
Parking Light	3157CK	Buy 3157CK →
Tail Light	3157	Buy 3157 →
Reverse Light	3156	Buy 3156 →
License Plate	194	Buy 194 →
Map Light	168	Buy 168 →

How do the 1999 GMC Sierra 1500's bulbs compare to other years?

The 2000 model switched to a different bulb configuration.

This bulb configuration covers the 1999 model years. 2000 →

Finding the best installation guide...

Other Sierra 1500 Years

2020 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000

Other Vehicles That Use 9006 Bulbs

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9006 Comparisons

9005 vs 9006 9006 vs H11 9006 vs HB4