What is the low beam headlight bulb size for a 1999 Cadillac Seville?

The 1999 Cadillac Seville 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 Cadillac Seville?

The high beam bulb size for the 1999 Cadillac Seville is 194.

Why are my 1999 Cadillac Seville headlights dim?

Dim headlights on a 1999 Cadillac Seville 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 Cadillac Seville fog light?

The 1999 Cadillac Seville uses a 880 LED bulb for the fog light position.

Is the 1999 Cadillac Seville single or dual beam?

The 1999 Cadillac Seville 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 Cadillac Seville?

Yes, the 1999 Cadillac Seville 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 Cadillac Seville have fog lights?

Yes, the 1999 Cadillac Seville takes a 880 LED bulb for the fog light position.

How do I change the headlight on a 1999 Cadillac Seville?

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 Cadillac Seville?

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 Cadillac Seville 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 Cadillac Seville?

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.

This vehicle is part of the 1998–1999 Cadillac Seville generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 1999 Cadillac Seville

What Size Bulbs Does a 1999 Cadillac Seville 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 Cadillac Seville Have?

Owners of the 1999 Cadillac Seville 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 9006 LED low beam and 194 high beam bulbs for precise light distribution. This model belongs to the early years of the Seville's 1998-2004 production span.

Can You Put LED Bulbs in a 1999 Cadillac Seville?

Upgrading to LED is one of the most effective ways to modernize your Cadillac's appearance and safety profile. We recommend starting your upgrade with the 9006 LED low beams, as they see the most use. Adding a matching 194 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 Cadillac Seville Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9006 LED	Buy 9006 LED →
High Beam	194	Buy 194 →
Fog Light	880 LED	Buy 880 LED →
Brake Light	194	Buy 194 →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	3157NA LED	Buy 3157NA LED →
Turn Signal Rear	3057 LED	Buy 3057 LED →
License Plate	194	Buy 194 →
Map Light	168	Buy 168 →
Parking Light	3157NA	Buy 3157NA →
Reverse Light	1156	Buy 1156 →
Trunk Light	561	Buy 561 →

Installation Guide

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Other Seville Years

2004 2003 2002 2001 2000 1998

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