The 2019 Cadillac XTS has 22 electrical bulb & socket parts with verified fitment on this page — 7 part types and 5 brands, covering both the 3.6L V6 and the 3.6L V6 Turbocharged. Each part includes a manufacturer part number and application notes.
On the 2019 Cadillac XTS, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. Most of the listed parts are Back Up / Reverse Lamp Bulb (8 parts), License Plate Lamp Bulb (6 parts) and Dome Light Bulb (3 parts). The other 4 part types cover the remaining 5 parts.
The 2019 Cadillac XTS was sold with both the 3.6L V6 and the 3.6L V6 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
5 brands supply electrical bulb & socket parts for the 2019 Cadillac XTS, led by SYLVANIA (9 parts), HELLA (7 parts) and WAGNER (3 parts), plus 2 more brands. Quality grades include Standard Replacement, Extended Life and Extra Bright.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2019 Cadillac XTS. 4 parts have it, including SYLVANIA 921LL (Back Up / Reverse Lamp Bulb) and SYLVANIA 2825LL (License Plate Lamp Bulb). Each part number opens a page with every vehicle that part fits.
Back Up / Reverse Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 3.6L V6 | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| HELLA Fits: 3.6L V6 | 921LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| WAGNER Fits: 3.6L V6 | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 921ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: 3.6L V6 | 921WLED | 🇺🇸 US 🇨🇦 CA | LEDWhite | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.6L V6 | 921 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 921 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 18.00 W | View on Amazon |
| WAGNER Fits: 3.6L V6 | 921 | 🇺🇸 US 🇨🇦 CA | Bulb Type: T-5 Bulb 5/8 (16mm) DiameterVoltage: 12.800 Volts (Direct Current) | View on Amazon |
This table covers the bulbs in the reverse lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
8 Back Up / Reverse Lamp Bulb parts for the 2019 Cadillac XTS come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is SYLVANIA 921LL.
In the Extended Life grade, SYLVANIA, HELLA and WAGNER supply 3 parts: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA 921LL.
In the Extra Bright (improved visibility, but shorter life) grade, SYLVANIA supplies 1 part: grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA 921ST.
The LED (instant-on, long life, energy-saving) section lists 1 option from WAGNER — grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. WAGNER 921WLED is listed in this group.
In the Standard Replacement grade, HELLA, SYLVANIA and WAGNER supply 3 parts: built to original-equipment specification. A representative part number is HELLA 921.
Part numbers include SYLVANIA 921LL, among others listed above.
Dome Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.6L V6 | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 3.6L V6 | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 2886XSL | 🇺🇸 US 🇨🇦 CA | LEDStraight Base Connector In Line with Bulb | View on Amazon |
This table covers the bulbs in the dome lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
3 Dome Light Bulb parts for the 2019 Cadillac XTS come from 2 brands — HELLA and SYLVANIA.
This group includes HELLA 2825, HELLA 2825BL and SYLVANIA 2886XSL.
License Plate Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 3.6L V6 | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.6L V6 | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 3.6L V6 | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
This table covers the bulbs that light the license plate. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
6 License Plate Lamp Bulb parts for the 2019 Cadillac XTS come from 2 brands — SYLVANIA and HELLA. The "Popular" part is SYLVANIA 2825LL.
Extended Life: 1 part, from SYLVANIA. A representative part number is SYLVANIA 2825LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 2825ST.
The LED (instant-on, long life, energy-saving) section: 1 option from SYLVANIA. SYLVANIA 2825SL is listed in this group.
Standard Replacement: 3 parts, from HELLA and SYLVANIA. A representative part number is HELLA 2825.
This group includes SYLVANIA 2825LL, SYLVANIA 2825ST and SYLVANIA 2825SL and the remaining parts above.
Step / Courtesy Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 13500832 | 🇺🇸 US 🇨🇦 CA | RearCLEAR | View on Amazon |
This table covers the bulbs in the step and courtesy lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
This group shows a single part: GM GENUINE 13500832.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.6L V6 | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
This table covers the bulbs in the tail lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2019 Cadillac XTS — HELLA 2825.
Trunk / Cargo Area Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | Trunk LightBulb | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 175SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
This table covers the bulbs in the trunk or cargo-area lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
2 Trunk / Cargo Area Light Bulb parts are listed for the 2019 Cadillac XTS, from PEAK and SYLVANIA.
Listed part numbers: PEAK 168 and SYLVANIA 175SL.
Turn Signal Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 13503360 | 🇺🇸 US 🇨🇦 CA | Fits Platinum or Premium LuxuryTRADE # W16W | View on Amazon |
This table covers the bulbs in the turn-signal lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
This group shows a single part: GM GENUINE 13503360.
Buying Electrical Bulb & Socket Parts for a 2019 Cadillac XTS
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Match the engine first. Every electrical bulb & socket part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Back Up / Reverse Lamp Bulb and License Plate Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2019 Cadillac XTS?
Our catalog currently lists 22 electrical bulb & socket parts for the 2019 Cadillac XTS across 7 subcategories and 5 brands, covering both the 3.6L V6 and the 3.6L V6 Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2019 Cadillac XTS engines?
Yes. Every electrical bulb & socket part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical bulb & socket problems on a 2019 Cadillac XTS?
Common symptoms include a lamp that flickers over bumps, melted or discolored socket plastic, or bulbs that keep failing early on one side. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2019 Cadillac XTS was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2019 Cadillac XTS?
First match the engine — each row shows which engine(s) the part fits. Then repeated bulb failure in one position usually means a socket or ground problem, not bad bulbs — replace the socket rather than chase it. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2019 Cadillac XTS
Electrical Bulb & Socket Parts for Other Cadillac XTS Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.