Cadillac XTS 2017 Bulb Size
Bulb size chart
The 2017 Cadillac XTS uses a mix of LED and replaceable bulb types, and the exact fit can vary by lighting position, trim, and market. This page helps you verify bulb sizes by lighting position so you can match the correct replacement before you buy.
If you are replacing a headlight, taillight, interior lamp, or license plate bulb on a 2017 Cadillac XTS, checking the bulb chart by location is the safest way to avoid ordering the wrong part. It is especially useful when the same model year may use different lighting setups depending on equipment level.
For best fitment, compare your vehicle’s trim and lighting package with the bulb positions listed here, since Cadillac used LED assemblies in many exterior locations and different bulb types in some interior and auxiliary lamps. Some owners may see halogen-style service bulbs on certain markets or body styles, while others will have sealed LED units that are not serviced as a simple bulb swap. If you are considering an aftermarket LED conversion, confirm compatibility with the socket, polarity, and any required resistors or adapters. Before purchasing, remove the installed bulb and read the number on the base whenever possible, because that is the most reliable way to confirm the correct replacement for your specific 2017 XTS.
FAQ
What headlight bulb does a 2017 Cadillac XTS use?
The 2017 Cadillac XTS uses a D3S bulb for both the high beam and low beam headlight positions listed on this page.
Are the brake lights on the 2017 Cadillac XTS replaceable bulbs?
The brake light bulb position is listed as LED, so the brake light is not a standard halogen bulb swap. In many cases, the LED unit is part of the lamp assembly.
What bulb size is used for the reverse lights?
The back up reverse light bulb is listed as 921 for the 2017 Cadillac XTS.
What are the front turn signal and parking light bulb sizes?
Both the front turn signal light bulb and the parking light bulb are listed as 7444NA on this model year.
What bulb does the rear turn signal use?
The rear turn signal light bulb is listed as LED for the 2017 Cadillac XTS.
What bulb size is used for the license plate lights?
The license plate light bulb can be 2825 or 98, depending on the exact setup on the vehicle.
What are the interior door light bulb options?
The interior door light bulb is listed as 2825 or 98, so either bulb type may apply depending on the installed lamp.
What bulb is used for the trunk or cargo area light?
The trunk or cargo area light bulb is listed as 194 or 7441.
What is the vanity mirror light bulb size?
The vanity mirror light bulb is listed as 7065 for the 2017 Cadillac XTS.
What bulb does the dome light use?
The dome light bulb is listed as 2886X.
Does the 2017 Cadillac XTS use LED daytime running lights?
Yes, the daytime running light bulb position is listed as LED.
Why might two 2017 Cadillac XTS cars use different bulb sizes?
Trim level, lighting package, market, and body style can change the bulb type used in a specific position. That is why it is important to verify the bulb by location before ordering.
Should I check the old bulb before buying a replacement?
Yes. Checking the installed bulb is the best way to confirm fitment, especially for positions that may use more than one bulb number or vary by package.