Buick LaCrosse 2019 Bulb Size
Bulb size chart
This page helps you verify the bulb sizes for the 2019 Buick LaCrosse by lighting position, so you can match the correct replacement before you buy. Whether you are changing an exterior lamp or an interior light, checking the location first is the easiest way to avoid ordering the wrong bulb.
The 2019 Buick LaCrosse uses a mix of LED lighting and replaceable bulb types depending on the lamp location. Some positions are listed as LED assemblies, while others use specific bulb sizes such as D3S, 921, 194/7441, 2825/98, 7440, 7065, H11 LED, H16 LED, and 7440R.
Fitment can vary by trim, lighting package, market, and body style, so always compare this guide with the bulb already installed in your vehicle before purchasing. Some exterior lamps on the 2019 LaCrosse are factory LED units, which may require replacing the whole assembly rather than a simple bulb swap, while other positions may allow halogen-to-LED aftermarket conversions. If you are upgrading to LED, check polarity, connector style, and available space inside the housing, and make sure the replacement is compatible with your vehicle’s electrical system and any warning-message or flicker issues.
FAQ
What bulb does the 2019 Buick LaCrosse use for the low and high beams?
The headlight bulb for both high beam and low beam is listed as D3S on the 2019 Buick LaCrosse.
What is the reverse light bulb size for the 2019 LaCrosse?
The back up reverse light bulb is 921.
What bulb fits the rear turn signal on a 2019 Buick LaCrosse?
The rear turn signal light bulb is 7440.
What bulb is used for the brake light on this model?
The brake light bulb is 7440R.
What are the license plate bulb options for the 2019 Buick LaCrosse?
The license plate light bulb is listed as 2825 or 98, depending on the specific lamp setup.
What size is the vanity mirror light bulb?
The vanity mirror light bulb is 7065.
What bulb is used for the trunk or cargo area light?
The trunk or cargo area light uses 194 or 7441.
What bulb fits the interior door light and stepwell light?
Both the interior door light bulb and the stepwell light bulb are listed as 194 or 7441.
Are the front fog lights on the 2019 Buick LaCrosse always the same bulb?
No. The front fog light bulb is listed as H11 LED or H16 LED, and the exact fit can depend on trim or lighting package.
Which exterior lights on the 2019 LaCrosse are listed as LED units?
The center high mount stop light, front turn signal, parking light, tail light, daytime running light, front side marker, and rear side marker are listed as LED.
Can I replace an LED lamp on the 2019 Buick LaCrosse with a standard bulb?
Usually no. If the lamp is listed as LED, it is often a sealed LED assembly rather than a standard replaceable bulb.
Why should I check the installed bulb before ordering parts?
Because trim level, package options, and market differences can change the exact bulb used, and the installed bulb is the best confirmation for fitment.