What is the low beam headlight bulb size for a 1991 GMC Tracker?

The 1991 GMC Tracker uses a 9004 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 1991 GMC Tracker?

The high beam bulb size for the 1991 GMC Tracker is 74.

Why are my 1991 GMC Tracker headlights dim?

Dim headlights on a 1991 GMC Tracker can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9004 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1991 GMC Tracker fog light?

The 1991 GMC Tracker uses a LED Light bulb for the fog light position.

Is the 1991 GMC Tracker single or dual beam?

The 1991 GMC Tracker uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1991 GMC Tracker?

Yes, the 1991 GMC Tracker comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9004 LED LED conversion kit for the low beams.

Does the 1991 GMC Tracker have fog lights?

Yes, the 1991 GMC Tracker takes a LED Light bulb for the fog light position.

How do I change the headlight on a 1991 GMC Tracker?

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 9004 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 1991 GMC Tracker?

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 9004 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 1991 GMC Tracker headlights?

A pair of halogen 9004 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 1991 GMC Tracker?

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 9004 LED position are available as direct plug-and-play replacements.

This vehicle is part of the 1989–1991 GMC Tracker generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 1991 GMC Tracker

What Size Bulbs Does a 1991 GMC Tracker 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 1991 GMC Tracker Have?

Owners of the 1991 GMC Tracker will find a total of 12 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9004 LED low beam and 74 high beam bulbs for precise light distribution. This model belongs to the late years of the Tracker's 1989-1991 production span.

Can You Put LED Bulbs in a 1991 GMC Tracker?

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 9004 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 LED Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1991 GMC Tracker Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9004 LED	Buy 9004 LED →
High Beam	74	Buy 74 →
Fog Light	LED Light	Buy LED Light →
Brake Light	Brake Light Assembly	Buy Brake Light Assembly →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	1157NA LED	Buy 1157NA LED →
Turn Signal Rear	1157 LED	Buy 1157 LED →
Reverse Light	1156	Buy 1156 →
Dome Light	DE3022	Buy DE3022 →
License Plate	168	Buy 168 →
Parking Light	1157NA	Buy 1157NA →
Trunk Light	LED Light	Buy LED Light →