Buick LaCrosse 2015 Bulb Size
Bulb size chart
This page helps you verify bulb sizes for the 2015 Buick LaCrosse by lighting position, so you can match the right bulb to the right socket before you buy. Because Buick used different lighting setups depending on trim, market, and body style, it is important to check the exact lamp location rather than relying on a single “one-size-fits-all” guess.
For the 2015 Buick LaCrosse, this chart covers exterior bulbs such as headlights, turn signals, parking lights, tail lights, brake lights, reverse lights, and license plate lights, along with common interior bulbs like dome, map, glove box, trunk, stepwell, courtesy, door, and vanity mirror lights. Use the position-specific listings below to narrow down the correct bulb type for your car.
Fitment can vary on the 2015 Buick LaCrosse, especially between halogen and HID headlight packages and across different trim levels or regional builds. If your car has halogen headlights, the DRL, side marker, and headlight bulb types differ from HID-equipped cars, and aftermarket LED conversions may require extra attention to beam pattern, polarity, and compatibility. Before ordering, it is smart to remove the installed bulb and compare the base, connector, and markings, since the same model year can use different bulbs in different positions.
FAQ
What bulb does the 2015 Buick LaCrosse use for the low and high beams with HID headlights?
For 2015 Buick LaCrosse models equipped with HID headlights, the high beam and low beam bulb type is D3S.
What bulb fits the halogen headlight setup on a 2015 Buick LaCrosse?
If your 2015 Buick LaCrosse has halogen headlights, the high beam and low beam bulb type is 9012.
What is the daytime running light bulb for HID headlight models?
On 2015 Buick LaCrosse models with HID headlights, the daytime running light bulb is listed as LED. The exact LED replacement can vary by housing, so confirm the installed bulb and connector before buying.
What is the daytime running light bulb for halogen headlight models?
On 2015 Buick LaCrosse models with halogen headlights, the daytime running light bulb is 7443.
What bulb is used for the front side marker on HID-equipped models?
For 2015 Buick LaCrosse models with HID headlights, the front side marker light bulb is listed as LED. Check the original bulb and socket style to confirm fitment.
What bulb is used for the front side marker on halogen-equipped models?
For 2015 Buick LaCrosse models with halogen headlights, the front side marker light bulb is 7443A.
What bulb fits the front turn signal and parking light positions?
The front turn signal light bulb is 7444NA, and the parking light bulb is also 7444NA on the 2015 Buick LaCrosse.
What bulb does the rear turn signal use?
The rear turn signal light bulb for the 2015 Buick LaCrosse is 7440A.
What bulb is used for the reverse lights?
The back up reverse light bulb is 921 on the 2015 Buick LaCrosse.
Are the brake lights, tail lights, and center high mount stop light LED on this car?
Yes. The 2015 Buick LaCrosse uses LED bulbs for the center high mount stop light, brake lights, tail lights, and rear side marker lights.
What bulb fits the license plate lights on the 2015 Buick LaCrosse?
The license plate light bulb can be 2825 or 98, depending on the exact lamp assembly.
What interior bulbs are common in the dome, map, glove box, and trunk lights?
Several interior positions on the 2015 Buick LaCrosse use 2825 or 98 bulbs, including the dome light, map light, interior door light, courtesy light, glove box light, trunk or cargo area light, and stepwell light. The vanity mirror light uses 7065.
Why should I check the installed bulb before ordering replacements?
Because trim and lighting package differences can change bulb fitment, checking the installed bulb helps confirm the correct base, size, and connector. This is especially useful when choosing between halogen and HID setups or when replacing with aftermarket LED bulbs.