Buick LaCrosse 2017 Bulb Size

Bulb size chart

Fog Light Bulb Front - H11 LED, H16 LED
Headlight Bulb High Beam and Low Beam - D3S
Back Up Reverse Light Bulb - 921
Brake Light Bulb - 7440R
Center High Mount Stop Light Bulb - LED
Daytime Running Light Bulb - LED
License Plate Light Bulb - 2825, 98
Parking Light Bulb - LED
Side Marker Light Bulb Front - LED
Side Marker Light Bulb Rear - LED
Stepwell Light Bulb - 194, 7441
Tail Light Bulb - LED
Turn Signal Light Bulb Front - LED
Turn Signal Light Bulb Rear - 7440
Dome Light Bulb - LED
Interior Door Light Bulb - 194, 7441
Map Light Bulb - LED
Trunk or Cargo Area Light - 194, 7441
Vanity Mirror Light Bulb - 7065

H11 LED Bulbs

Used for: Fog Light Bulb Front

View all 5 replacement options for size H11 LED →

H16 LED Bulbs

Used for: Fog Light Bulb Front

View all 5 replacement options for size H16 LED →

D3S Bulbs

Used for: Headlight Bulb High Beam and Low Beam

Philips D3S Standard Authentic Xenon HID

Philips D3S Standard Authentic Xenon HID

POWERFUL LIGHT FROM XENON HID BULBS OFFER MAXIMUM SAFETY: Xenon HID (High Intensity Discharge) headlight bulbs offer twice as much light* for safer driving in all conditions while consuming 50% less power. The intense white light produced by the Xenon HID lamps is comparable to daylight. Studies have demonstrated that xenon automotive lighting helps drivers to concentrate on the road and to distinguish obstacles and road signs much faster than traditional lamps. *Compared to standard halogen bulbs

$79.99

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OSRAM XENARC D3S HID Xenon Headlight bulbs 66340

OSRAM XENARC D3S HID Xenon Headlight bulbs 66340

 Extremely Long Life with precise light distribution & consistent performance - can efficiently work for 4000 hours.  All HID lights discolor to get whiter/bluer over usage & dim down. When comparing this NEW bulb against your OLD bulb, the NEW bulb may look warmer in color, which is normal. Replacing in PAIR is suggested. Extremely Long Life with precise light distribution & consistent performance. 100% legal for On/Off-road use | Replace in pairs for optimal performance.

$108.99

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View all 10 replacement options for size D3S →

921 Bulbs

Used for: Back Up Reverse Light Bulb

View all 14 replacement options for size 921 →

7440R Bulbs

Used for: Brake Light Bulb

View all 8 replacement options for size 7440R →

2825 Bulbs

Used for: License Plate Light Bulb

View all 12 replacement options for size 2825 →

98 Bulbs

Used for: License Plate Light Bulb

View all 10 replacement options for size 98 →

194 Bulbs

Used for: Stepwell Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light

View all 21 replacement options for size 194 →

7441 Bulbs

Used for: Stepwell Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light

KATUR T20 White/Amber Switchback LED Light Bulbs (7441)

KATUR T20 White/Amber Switchback LED Light Bulbs (7441)

The KATUR T20 White/Amber Switchback LED Light Bulbs (7441) are a great upgrade for your vehicle's lighting. These energy-efficient bulbs have a 12V operating voltage and are designed to last 50,000 hours, 50 times longer than traditional incandescent bulbs. The single-contact 7440 LED light bulb replaces most auto car incandescents and is well-matched with the original incandescent lights. The easy plug-and-play installation means you just have to plug it into the socket, and flip the bulb horizontally if it does not light up to match the + and - polarity. With 42 2835 SMD LED lights, this bulb provides bright and versatile white/amber switchback lighting. It is CE/RoHS compliant, ensuring high standards and quality. Choose the KATUR T20 White/Amber Switchback LED Light Bulbs for a longer-lasting and more versatile lighting solution.

$17.99

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View all 13 replacement options for size 7441 →

7440 Bulbs

Used for: Turn Signal Light Bulb Rear

View all 8 replacement options for size 7440 →

7065 Bulbs

Used for: Vanity Mirror Light Bulb

TUINCYN Festoon 7065 LED Interior Bulb

TUINCYN Festoon 7065 LED Interior Bulb

Discover the brilliance of the TUINCYN Festoon 7065 LED Interior Bulb, a perfect blend of design and functionality tailored for modern illumination needs. Freshly designed and 100% brand new, this bulb is compatible with a standard 31MM socket and is powered by the 5630 SMD LED technology. With 8 LEDs per bulb, it promises a luminous experience. Its wide 150-degree lighting angle ensures a broad glow, making every corner visible. Installation is a breeze; just plug it in and enjoy the brilliance without any complex wiring. Its sturdy design, achieved through point-to-point welding, ensures durability. The LED technology not only provides brighter light but also conserves power. Moreover, its 360-degree beam angle guarantees comprehensive lighting with quick response times. Choose the TUINCYN Festoon 7065 for an unmatched interior lighting journey.

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Wiseshine 7065 LED Interior Festoon Bulbs

Wiseshine 7065 LED Interior Festoon Bulbs

Introducing the Wiseshine 7065 LED Interior Festoon Bulbs - a perfect replacement for traditional Festoon Miniature Halogen light bulbs, including models like DE3175, DE3021, DE3022, 6428, and 7065. Crafted with precision, each bulb is powered by 2 super-bright 5050 chipsets delivering 1.5 watts and producing an individual light intensity of 90-100 lumens. Enhanced with a robust thick copper Aluminum Base Board, these bulbs promise an extended lifespan of up to 50,000 hours, ensuring prolonged brilliance and reliability. Upgrade to the Wiseshine 7065 for a brighter and longer-lasting lighting solution.

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View all 12 replacement options for size 7065 →

This page helps you verify the bulb sizes for the 2017 Buick LaCrosse by lighting position, so you can match the correct bulb before you buy. Because different lights on the car use different bulb types, checking the exact location is the safest way to avoid a wrong fit.

For the 2017 Buick LaCrosse, several exterior and interior positions use LED lighting, while some serviceable bulbs use specific part numbers such as D3S for the headlight high beam and low beam, 921 for the back up reverse light, and 7440 for the rear turn signal. Use the chart below to compare each bulb location with the correct size or type.

Fitment can vary by trim, lighting package, market, and body style, so always confirm the installed bulb before ordering replacements. Some versions of the 2017 LaCrosse use factory LED assemblies, while others may have halogen-style service bulbs or different connector and housing setups. If you are considering an aftermarket LED conversion, make sure the bulb base, polarity, and housing depth are compatible, and check whether the new bulb will trigger warning messages or require an adapter or resistor. The most reliable approach is to inspect the bulb currently in the vehicle and compare it with the chart before purchase.

FAQ

What headlight bulb does the 2017 Buick LaCrosse use?

The chart lists D3S for both the high beam and low beam headlight bulb on the 2017 Buick LaCrosse.

What size is the back up reverse light bulb on this model?

The back up reverse light bulb is listed as 921.

What bulb does the rear turn signal use?

The rear turn signal light bulb is listed as 7440.

What is the brake light bulb size for the 2017 Buick LaCrosse?

The brake light bulb is listed as 7440R.

Are the front turn signal and parking lights LED?

Yes. The front turn signal light bulb and parking light bulb are listed as LED on this page.

Does the 2017 Buick LaCrosse use LED daytime running lights?

Yes. The daytime running light bulb is listed as LED.

What bulb is used for the license plate lights?

The license plate light bulb is listed as 2825 or 98.

What bulb fits the trunk or cargo area light?

The trunk or cargo area light uses 194 or 7441.

What bulb is used for the interior door light and stepwell light?

Both the interior door light bulb and the stepwell light bulb are listed as 194 or 7441.

What bulb does the vanity mirror light use?

The vanity mirror light bulb is listed as 7065.

What fog light bulb does the 2017 Buick LaCrosse use?

The front fog light bulb is listed as H11 LED or H16 LED, depending on the vehicle setup.

Do all 2017 Buick LaCrosse models use the same bulbs?

Not always. Trim level, lighting package, market, and body style can change the bulb type or whether a light is LED or serviceable.

Should I check the old bulb before ordering a replacement?

Yes. Checking the installed bulb is the best way to confirm fitment, especially on a vehicle with mixed LED and non-LED lighting positions.

Can I replace a factory bulb with an LED upgrade?

Often yes, but the replacement must match the socket and fit the housing. Some LED conversions may need resistors, adapters, or extra clearance.

Buick LaCrosse Bulb Size by Year