Cadillac ATS
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The Cadillac ATS is a compact luxury sedan and coupe that changed a few times across its production run, so bulb fitment can vary by model year, trim, and lighting package. This model page is meant to help you get oriented before you choose the exact year page for your vehicle.
If you are looking for the correct headlight, tail light, turn signal, brake, reverse, parking, or interior bulb, start here and then open the matching year page for 2013, 2014, 2015, 2016, 2017, 2018, or 2019. The year-specific page will give the exact bulb sizes and the most reliable fitment guidance.
For the Cadillac ATS, small differences in factory options can matter. Halogen and HID setups, LED-equipped trims, and package changes may all affect the bulb type used in a given position. That is why this model page should be used as a guide, while the year page is the source for exact bulb sizes. If your ATS has been modified, or if a previous owner changed the lighting, it is especially important to verify the existing bulb before ordering replacements.
FAQ
Why does the Cadillac ATS need year-specific bulb information?
Because the ATS was sold across multiple years, and lighting equipment can change from one year to another. Even within the same model, trim level, body style, and option package can affect the bulb used. The year page gives the exact fitment for that specific version.
Which Cadillac ATS years are covered on this model page?
This model page covers the 2013, 2014, 2015, 2016, 2017, 2018, and 2019 Cadillac ATS. Use the year that matches your vehicle for the most accurate bulb chart.
Can I use the same bulb size for every Cadillac ATS?
Not safely. Some bulb positions may stay the same across several years, but others can change. Headlights, fog lights, brake lights, and interior bulbs may differ depending on the year and equipment. Always check the year-specific page before buying.
Does the ATS coupe use the same bulbs as the sedan?
Not always. The coupe and sedan can share many lighting parts, but there may still be differences depending on the year and trim. If you own a coupe, make sure you are viewing the correct year page and confirming the body style when possible.
What if my ATS has the optional lighting package?
Optional lighting packages can change the bulb type or the way the lamp assembly is built. This is common with headlights and some exterior lamps. If your ATS has upgraded factory lighting, use the year page and compare it with your current assembly before ordering.
How do I find the exact bulb size for my Cadillac ATS?
Start with this model page, then open the year page that matches your ATS. The year page will list the exact bulb sizes for each lighting position. If you are still unsure, compare the bulb in your vehicle to the chart and check the owner’s manual or lamp housing markings.
What bulbs are commonly checked on a Cadillac ATS?
Owners often look up headlights, low beams, high beams, fog lights, front turn signals, side markers, brake lights, tail lights, reverse lights, license plate lights, and interior bulbs. The exact bulb sizes for each of these locations should be confirmed on the correct year page.
If my ATS has LED lights, do I still need a bulb chart?
Yes. Some ATS lamps may use LEDs in certain positions, while other positions still use replaceable bulbs. A bulb chart helps you identify which lights are serviceable and which ones may require a different replacement approach.
What should I do if the bulb size on my car does not match the chart?
First check that you are on the correct year page for your ATS. Then confirm the trim, package, and lighting type. If the vehicle has been modified or repaired, the current bulb may not match original equipment. In that case, inspect the installed bulb and the lamp assembly directly.
Are the bulb sizes on the Cadillac ATS the same as other Cadillac models?
Not necessarily. Even if another Cadillac uses a similar lamp style, the ATS can have different bulb requirements. It is best to use the ATS-specific year page rather than assuming another model will match.
Why is it important to match the year before ordering replacement bulbs?
Because the wrong bulb can fail to fit, may not lock into the socket correctly, or may not work with the vehicle’s lighting system. Matching the year reduces the chance of buying the wrong part and makes replacement much easier.
Can I use this page to replace a burned-out bulb right away?
Use this page to narrow down the correct ATS year first, then go to the year-specific chart for the exact bulb size. That is the safest way to replace a burned-out bulb without guessing.