The 2019 Buick Lacrosse has 62 electrical bulb & socket parts with verified fitment on this page — 13 part types and 8 brands, covering both the 2.5L L4 and the 3.6L V6. Each part includes a manufacturer part number and application notes.
The bulb and socket system on the 2019 Buick Lacrosse covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. The largest groups are Brake Light Bulb (10 parts), Back Up / Reverse Lamp Bulb (9 parts) and Fog / Driving Lamp Bulb (9 parts). The other 10 part types cover the remaining 34 parts.
The 2019 Buick Lacrosse was sold with both the 2.5L L4 and the 3.6L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
8 brands supply electrical bulb & socket parts for the 2019 Buick Lacrosse, led by SYLVANIA (29 parts), HELLA (11 parts) and GM GENUINE (7 parts), plus 5 more brands. Quality grades include Standard Replacement, LED and Extended Life.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2019 Buick Lacrosse. 11 parts have it, including SYLVANIA 921LL (Back Up / Reverse Lamp Bulb) and SYLVANIA 7440LL (Brake Light 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 |
| GM GENUINE Fits: 3.6L V6 | 13503360 | 🇺🇸 US 🇨🇦 CA | TRADE # W16WCLEAR | 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.
9 Back Up / Reverse Lamp Bulb parts for the 2019 Buick Lacrosse come from 4 brands — SYLVANIA, WAGNER, HELLA and 1 other brand. 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, GM GENUINE, SYLVANIA and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is HELLA 921.
Listed part numbers: SYLVANIA 921LL, plus the other parts above.
Brake Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 3.6L V6 | 7440LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W3X16D | View on Amazon |
| WAGNER Fits: 3.6L V6 | 7440LL | 🇺🇸 US 🇨🇦 CA | Long LifeSingle Contact Wedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 7440ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 3.6L V6 | 7440RLED | 🇺🇸 US 🇨🇦 CA | Ultinon LEDRed | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 7440RSL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 7440SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W3X16D | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | 13596816 | 🇺🇸 US 🇨🇦 CA | Wattage: 21 | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | Base Type: W3X16DWattage: 25.00 W | View on Amazon |
| WAGNER Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | Single Contact Wedge Base21.000 Watt | View on Amazon |
This table covers the bulbs in the stop 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.
10 Brake Light Bulb parts for the 2019 Buick Lacrosse come from 5 brands — SYLVANIA, WAGNER, PHILIPS and 2 other brands. The "Popular" part is SYLVANIA 7440LL.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 7440LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 7440ST.
The LED (instant-on, long life, energy-saving) section: 3 options from SYLVANIA and PHILIPS. PHILIPS 7440RLED is listed in this group.
Standard Replacement: 4 parts, from HELLA, GM GENUINE, SYLVANIA and 1 other brand. A representative part number is HELLA 7440.
Door Panel Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 175SL | 🇺🇸 US 🇨🇦 CA | LED | 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.
One part is listed for the 2019 Buick Lacrosse — SYLVANIA 175SL.
Fog / Driving Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 3.6L V6 | H11LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.6L V6 | H1120 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | H11XV | 🇺🇸 US 🇨🇦 CA | Xtra VisionColor Temperature: 3200 KV | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | H11SU | 🇺🇸 US 🇨🇦 CA | Silver Star UltraColor Temperature: 4100 KV | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | H11ST | 🇺🇸 US 🇨🇦 CA | Color Temperature: 4000 KVSilver Star | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | H11SZGP | 🇺🇸 US 🇨🇦 CA | Silver Star zXe GOLDBase Type: PGJ19 | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | H11LEDSP | 🇺🇸 US 🇨🇦 CA | LEDBase Type: PGJ19-2 | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | H11LEDHP | 🇺🇸 US 🇨🇦 CA | LED ULTRABase Type: PGJ19-2 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 3.6L V6 | H11 | 🇺🇸 US 🇨🇦 CA | Base Type: PGJ19-2 | 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.
9 Fog / Driving Lamp Bulb parts are listed for the 2019 Buick Lacrosse, from SYLVANIA and HELLA. SYLVANIA H11LL carries the "Popular" badge.
The Extended Life section: 1 option from SYLVANIA. SYLVANIA H11LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 5 options from SYLVANIA and HELLA. HELLA H1120 is listed in this group.
LED (instant-on, long life, energy-saving): 2 parts, from SYLVANIA. A representative part number is SYLVANIA H11LEDSP.
The Standard Replacement section: 1 option from SYLVANIA. SYLVANIA H11 is listed in this group.
Part numbers include SYLVANIA H11LL, HELLA H1120 and SYLVANIA H11XV, among others listed above.
Glove Box Light Bulb
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 175SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 13500832 | 🇺🇸 US 🇨🇦 CA | Clear | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | BulbProfessional Box | View on Amazon |
This table covers the bulbs in the glove-box 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 Glove Box Light Bulb parts are listed for the 2019 Buick Lacrosse, from SYLVANIA, GM GENUINE and PEAK.
LED (instant-on, long life, energy-saving): 1 part, from SYLVANIA. A representative part number is SYLVANIA 175SL.
The Standard Replacement section: 1 option from GM GENUINE. GM GENUINE 13500832 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
This group includes SYLVANIA 175SL, GM GENUINE 13500832 and PEAK 168.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA Popular Fits: 3.6L V6 | D3S | 🇺🇸 US 🇨🇦 CA | High Beam and Low Beam | View on Amazon |
| WAGNER Popular Fits: 3.6L V6 | D3S | 🇺🇸 US 🇨🇦 CA | with Xenon Gas | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | 13587843 | 🇺🇸 US 🇨🇦 CA | TRADE # D3Swith HID Headlamps (T4F) | View on Amazon |
| HELLA Fits: 3.6L V6 | D3S4300K | 🇺🇸 US 🇨🇦 CA | 4300KSocket Type Bulb: PK32D-5 | View on Amazon |
| PEAK Fits: 3.6L V6 | D3S | 🇺🇸 US 🇨🇦 CA | Dual BeamProfessional Box | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | D3S | 🇺🇸 US 🇨🇦 CA | Dual BeamHIGH BEAM & LOW BEAM | View on Amazon |
| SYLVANIA Fits: 3.6L V6 | D3SSZ | 🇺🇸 US 🇨🇦 CA | Silver Star zXe | View on Amazon |
| ÜRO PARTS Fits: 3.6L V6 | D3S | 🇺🇸 US 🇨🇦 CA | High Beam and Low Beam | View on Amazon |
This table covers the bulbs that light the headlamps. Typical signs include a dark lamp, a flicker over bumps, or a bulb that keeps failing on one side. Avoid touching a halogen capsule. Repeated failure in one socket is usually the socket or ground, not the bulb.
8 Headlamp Bulb parts are listed for the 2019 Buick Lacrosse, from SYLVANIA, AUTOTECNICA, WAGNER and 4 other brands. AUTOTECNICA D3S carries the "Popular" badge.
Part numbers include AUTOTECNICA D3S and GM GENUINE 13587843, among others listed above.
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 |
| GM GENUINE Fits: 3.6L V6 | 13500812 | 🇺🇸 US 🇨🇦 CA | TRADE # W5WLL | 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.
7 License Plate Lamp Bulb parts for the 2019 Buick Lacrosse come from 3 brands — SYLVANIA, HELLA and GM GENUINE. 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: 4 parts, from HELLA, GM GENUINE and SYLVANIA. A representative part number is HELLA 2825.
This group includes SYLVANIA 2825LL, SYLVANIA 2825ST and SYLVANIA 2825SL and the remaining parts above.
Overhead Console Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | Console LightAt Floor Console | View on Amazon |
This table covers the replacement bulbs for the Overhead Console 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.
This group shows a single part: PEAK 168.
Parking Brake Warning Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | Stop LightBulb | View on Amazon |
This table covers the replacement bulbs for the Parking Brake Warning 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.
This group shows a single part: PEAK 7440.
Step / Courtesy Light Bulb
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 175SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 13500832 | 🇺🇸 US 🇨🇦 CA | RearCLEAR | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | Step or Courtesy LightInterior Door Light Bulb | 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.
3 Step / Courtesy Light Bulb parts for the 2019 Buick Lacrosse come from 3 brands — SYLVANIA, GM GENUINE and PEAK.
The LED (instant-on, long life, energy-saving) section: 1 option from SYLVANIA. SYLVANIA 175SL is listed in this group.
Standard Replacement: 1 part, from GM GENUINE. A representative part number is GM GENUINE 13500832.
1 further part sits outside the graded sections, with the same engine-level match.
This group includes SYLVANIA 175SL, GM GENUINE 13500832 and PEAK 168.
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 |
| HELLA Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W3X16D | 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.
HELLA supplies both parts for the 2019 Buick Lacrosse.
Listed part numbers: HELLA 2825 and HELLA 7440.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.6L V6 | 168LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 175SL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | L168 | 🇺🇸 US 🇨🇦 CA | Bulb Technology: IncandescentHeight: 2 in | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 3.6L V6 | 168 | 🇺🇸 US 🇨🇦 CA | Fits Trunk LightBulb | 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.
5 Trunk / Cargo Area Light Bulb parts are listed for the 2019 Buick Lacrosse, from HELLA, SYLVANIA, GM GENUINE and 1 other brand. HELLA 168 carries the "Popular" badge.
The Extended Life section: 1 option from HELLA. HELLA 168LL is listed in this group.
LED (instant-on, long life, energy-saving): 1 part, from SYLVANIA. A representative part number is SYLVANIA 175SL.
The Standard Replacement section: 2 options from HELLA and GM GENUINE. HELLA 168 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include HELLA 168, HELLA 168LL and SYLVANIA 175SL, among others listed above.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 7440LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W3X16D | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 7440ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.6L V6 | 7440 | 🇺🇸 US 🇨🇦 CA | Base Type: W3X16DWattage: 25.00 W | 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.
3 Turn Signal Lamp Bulb parts for the 2019 Buick Lacrosse come from SYLVANIA.
Extended Life: 1 part, from SYLVANIA. A representative part number is SYLVANIA 7440LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 7440ST.
Standard Replacement: 1 part, from SYLVANIA. A representative part number is SYLVANIA 7440.
This group includes SYLVANIA 7440LL, SYLVANIA 7440ST and SYLVANIA 7440.
Buying Electrical Bulb & Socket Parts for a 2019 Buick Lacrosse
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: Brake Light Bulb and Back Up / Reverse Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2019 Buick Lacrosse?
Our catalog currently lists 62 electrical bulb & socket parts for the 2019 Buick Lacrosse across 13 subcategories and 8 brands, covering both the 2.5L L4 and the 3.6L V6. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2019 Buick Lacrosse 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 Buick Lacrosse?
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 Buick Lacrosse 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 Buick Lacrosse?
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 Buick Lacrosse
Electrical Bulb & Socket Parts for Other Buick Lacrosse 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.