41 Electrical bulb & socket parts are listed for the 2015 Cadillac CTS, in 5 part types, covering all 4 engine options (2.0L L4 Turbocharged, 3.6L V6, 3.6L V6 Turbocharged and 6.2L V8 Supercharged). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2015 Cadillac CTS, 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 Fog / Driving Lamp Bulb (19 parts), Dome Light Bulb (9 parts) and Daytime Running Light Bulb (5 parts). The other 2 part types cover the remaining 8 parts.
The 2015 Cadillac CTS was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2015 Cadillac CTS electrical bulb & socket parts are SYLVANIA (17 parts), WAGNER (11 parts) and HELLA (7 parts), plus 5 more brands. Quality grades include Standard Replacement, Extra Bright and Extended Life.
8 parts on this 2015 Cadillac CTS page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PHILIPS 12085 (Daytime Running Light Bulb) and HELLA 921LED5K (Dome Light Bulb). Click any part number to see every vehicle that part fits.
Daytime Running Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 6.2L V8 Supercharged | 12085LL | 🇺🇸 US 🇨🇦 CA | Longer Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular Fits: 6.2L V8 Supercharged | 12085 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| SYLVANIA Fits: 6.2L V8 Supercharged | 5201 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WAGNER Fits: 6.2L V8 Supercharged | 5201 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | 5201SZ | 🇺🇸 US 🇨🇦 CA | Silver Star zXeCool White | View on Amazon |
This table covers the bulbs used as daytime running 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.
5 Daytime Running Light Bulb parts for the 2015 Cadillac CTS come from 3 brands — PHILIPS, SYLVANIA and WAGNER. The "Popular" part is PHILIPS 12085.
In the Extended Life grade, PHILIPS supplies 1 part: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is PHILIPS 12085LL.
In the Standard Replacement grade, PHILIPS, SYLVANIA and WAGNER supply 3 parts: built to original-equipment specification. A representative part number is PHILIPS 12085.
1 further part sits outside the graded sections, with the same engine-level match.
Part numbers include PHILIPS 12085, PHILIPS 12085LL and SYLVANIA 5201, among others listed above.
Dome Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 6.2L V8 Supercharged | 921LED5K | 🇺🇸 US 🇨🇦 CA | LED Miniature Bulb with Color Temperature of 5000KSocket Type Bulb: SV8.5-8 | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 6.2L V8 Supercharged | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | 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.
9 Dome Light Bulb parts are listed for the 2015 Cadillac CTS, from SYLVANIA, WAGNER and HELLA. HELLA 921LED5K carries the "Popular" badge.
The Extended Life section: 2 options from SYLVANIA and WAGNER. SYLVANIA 2825LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section lists 1 option from SYLVANIA — grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. SYLVANIA 2825ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, HELLA, SYLVANIA and WAGNER supply 3 parts: grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. A representative part number is HELLA 921LED5K.
The Standard Replacement section: 3 options from HELLA, SYLVANIA and WAGNER. HELLA 2825 is listed in this group.
Listed part numbers: HELLA 921LED5K, SYLVANIA 2825LL and WAGNER 17177LL, plus the other parts above.
Door Panel Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 6.2L V8 Supercharged | 906LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | 906LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | 906SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | 906 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 9.00 W | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | 906 | 🇺🇸 US 🇨🇦 CA | Wedge Base8.970 Watt | View on Amazon |
This table covers the replacement bulbs for the Door Panel Light. 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.
5 Door Panel Light Bulb parts for the 2015 Cadillac CTS come from 2 brands — SYLVANIA and WAGNER. The "Popular" part is SYLVANIA 906LL.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 906LL.
The LED (instant-on, long life, energy-saving) section: 1 option from SYLVANIA. SYLVANIA 906SL is listed in this group.
Standard Replacement: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 906.
This group includes SYLVANIA 906LL and SYLVANIA 906SL and the remaining parts above.
Fog / Driving Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 6.2L V8 Supercharged | H11LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
| HELLA Fits: 6.2L V8 Supercharged | H11LL | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | 1255H11LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 6.2L V8 Supercharged | H1120 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
| HELLA Fits: 6.2L V8 Supercharged | H11P50 | 🇺🇸 US 🇨🇦 CA | HalogenPerformance 50+ | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | H11XV | 🇺🇸 US 🇨🇦 CA | Xtra VisionColor Temperature: 3200 KV | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | H11SU | 🇺🇸 US 🇨🇦 CA | Silver Star UltraColor Temperature: 4100 KV | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | H11ST | 🇺🇸 US 🇨🇦 CA | Color Temperature: 4000 KVSilver Star | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | H11SZGP | 🇺🇸 US 🇨🇦 CA | Silver Star zXe GOLDBase Type: PGJ19 | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | H11BLX | 🇺🇸 US 🇨🇦 CA | BritelitePGJ19-2 Base | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | H11TVX | 🇺🇸 US 🇨🇦 CA | Truview Plus1.733 Base | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 6.2L V8 Supercharged | H11LEDSP | 🇺🇸 US 🇨🇦 CA | LEDBase Type: PGJ19-2 | View on Amazon |
| SYLVANIA Fits: 6.2L V8 Supercharged | H11LEDHP | 🇺🇸 US 🇨🇦 CA | LED ULTRABase Type: PGJ19-2 | View on Amazon |
| WAGNER Fits: 6.2L V8 Supercharged | H11LED | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Reduced Glare (for rain, fog, snow, or rural driving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 6.2L V8 Supercharged | H11YL | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 6.2L V8 Supercharged | H11 | 🇺🇸 US 🇨🇦 CA | Base Type: PGJ19-2 | View on Amazon |
| WAGNER Popular Fits: 6.2L V8 Supercharged | 1255H11 | 🇺🇸 US 🇨🇦 CA | Bulb Color: Clear | View on Amazon |
| GM GENUINE Fits: 6.2L V8 Supercharged | 13503417 | 🇺🇸 US 🇨🇦 CA | FrontTrade # 11 | View on Amazon |
| HELLA Fits: 6.2L V8 Supercharged | H11 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 or Socket Type Bulb: PGJY19-2 | View on Amazon |
This table covers the bulbs in the fog and driving 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.
19 Fog / Driving Lamp Bulb parts for the 2015 Cadillac CTS come from 4 brands — SYLVANIA, HELLA, WAGNER and 1 other brand. The "Popular" part is SYLVANIA H11LL.
Extended Life: 3 parts, from SYLVANIA, HELLA and WAGNER. A representative part number is SYLVANIA H11LL.
Extra Bright (improved visibility, but shorter life): 8 parts, from SYLVANIA, HELLA and WAGNER. A representative part number is HELLA H1120.
The LED (instant-on, long life, energy-saving) section: 3 options from SYLVANIA and WAGNER. SYLVANIA H11LEDSP is listed in this group.
The Reduced Glare (for rain, fog, snow, or rural driving) section lists 1 option from HELLA — grouped under the catalog's "Reduced Glare (for rain, fog, snow, or rural driving)" designation — the notes column spells out what sets them apart. HELLA H11YL is listed in this group.
Standard Replacement: 4 parts, from SYLVANIA, WAGNER, GM GENUINE and 1 other brand. A representative part number is SYLVANIA H11.
Fog / Driving Lamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.2L V8 Supercharged | S2611 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalContact Terminal Material: Plastic | View on Amazon |
| WALKER PRODUCTS Fits: 6.2L V8 Supercharged | 2701120 | 🇺🇸 US 🇨🇦 CA | Terminal Gender: Female | View on Amazon |
| WELLS Fits: 6.2L V8 Supercharged | 1P3537 | 🇺🇸 US 🇨🇦 CA | Used with H11 BulbWiring Harness | View on Amazon |
This table covers the sockets that hold a Fog / Driving Lamp bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
3 Fog / Driving Lamp Socket parts for the 2015 Cadillac CTS come from 3 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and WELLS.
Part numbers include STANDARD MOTOR PRODUCTS S2611, WALKER PRODUCTS 2701120 and WELLS 1P3537.
Buying Electrical Bulb & Socket Parts for a 2015 Cadillac CTS
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: Fog / Driving Lamp Bulb and Dome Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2015 Cadillac CTS?
Our catalog currently lists 41 electrical bulb & socket parts for the 2015 Cadillac CTS across 5 subcategories and 8 brands, covering all 4 engine options (2.0L L4 Turbocharged, 3.6L V6, 3.6L V6 Turbocharged and 6.2L V8 Supercharged). Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2015 Cadillac CTS 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 2015 Cadillac CTS?
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 2015 Cadillac CTS 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 2015 Cadillac CTS?
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 2015 Cadillac CTS
Electrical Bulb & Socket Parts for Other Cadillac CTS Years
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