Bulbs

Cadillac ATS Bulb Sizes

2019 Cadillac ATS stores 2 bulb-chart rows across 2 lighting positions.

Match the designation printed on the bulb or housing. Stored rows are chart records, not a count of lamps on one vehicle.

Lighting positions

Choose a lighting position to see the stored designation.

Complete bulb chart

PositionConfigurationDesignationTechnology
Headlight Bulb High Beam and Low BeamHalogen headlight configuration9012Halogen designation
Headlight Bulb High Beam and Low Beam(with HID headlights)Stored positionD3SHID capsule

Replacement check

Read the number on the installed bulb or the housing. Confirm whether the headlights are halogen, HID, or an LED assembly. H11 and H11B are different. 9005 and 9006 are different. This page does not substitute a nearby designation to fill the product list.

Questions

Does the 2019 Cadillac ATS chart include fog lights?

No fog-light bulb is stored for this year. This page does not add one.

How are HID bulbs handled?

D-series capsules such as D1S or D3S are HID. Exact catalog matches for those positions use HID products, not halogen bulbs.

Can I substitute a nearby bulb number?

No. H11 and H11B stay different. 9005 and 9006 stay different. This page matches the stored designation and does not swap in another bulb to fill the product list.

Does a catalog match guarantee the bulb fits?

A designation match means the product is filed under that bulb number and technology. It does not prove the lamp, socket, or vehicle configuration. Check the bulb in the housing before ordering.

How do I verify the replacement?

Read the number on the bulb or the housing, confirm whether the headlights are halogen, HID, or LED, and match that designation. Position names that say “with halogen headlights” or “with LED headlights” are separate configurations.

Does the Cadillac ATS bulb chart change by year?

Bulb rows are stored for 7 years, 2013–2019. This page shows 2019. Choose another year to see that chart. Years are not collapsed into one bulb list.