Factory setup not specified in fitment source

2004 Cadillac CTS Headlight Bulbs & Lighting Guide

Choose the factory headlight system below to see the correct bulb and recommendation path for this 2004 Cadillac CTS.

Low beam
Factory halogen system
High beam
9005XS
Factory setup
Factory setup not specified in fitment source

Choose the factory system installed in this vehicle. Bulb sizes and recommendations change with that selection.

2004 Cadillac CTS representative vehicle image

Best headlight upgrades

BulbFacts does not currently have a supported primary-headlight bulb size for this configuration, so no product is being recommended.

Factory setup not specified in fitment source

High Beam: 9005XS

Bulb size needs confirmation. Choose or verify the installed factory headlight system before using a bulb size or product recommendation.

Other bulbs

Available exterior and interior lighting data for this model year.

Brake Light
3157Possible fitment — verify installed bulb
Cargo / Trunk Light
211-2Possible fitment — verify installed bulb
Center High Mount Stop Light
T10Possible fitment — verify installed bulb
Courtesy Light
211-2Possible fitment — verify installed bulb
Dome Light
T10Possible fitment — verify installed bulb
Daytime Running Light
3157Possible fitment — verify installed bulb
Fog Light
9145Possible fitment — verify installed bulb
Front Side Marker
T10Possible fitment — verify installed bulb
Front Turn Signal
3157Possible fitment — verify installed bulb
License Plate Light
T10Possible fitment — verify installed bulb
Map Light
T10Possible fitment — verify installed bulb
Parking Light
T10Possible fitment — verify installed bulb
Technical details and sources

Fitment, factory-system research, and BulbFacts product tests remain separate evidence. A matching bulb size does not by itself make a conversion a vehicle-specific recommendation.

PositionBulb or systemEvidence status
High BeamFactory setup not specified in fitment source9005XSPossible fitment — verify installed bulb
Low BeamLighting: halogen9006XSLikely fitment
Low BeamLighting: HIDD1SLikely fitment

Each model year opens its own BulbFacts record. Bulb sizes and factory systems are not carried over from adjacent years.

Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.