Buick LaCrosse 2009 Bulb Size
Bulb size chart
This 2009 Buick LaCrosse bulb size guide helps you verify the correct bulbs by lighting position, so you can match the right part to the right socket before you buy. Whether you are replacing a headlight, tail light, dome light, or a small interior lamp, this page organizes the common bulb sizes for the 2009 Buick LaCrosse in one place.
Use the chart to compare each exterior and interior light location with its listed bulb type. The 2009 Buick LaCrosse can use different bulbs depending on the lamp position, and some lighting details may vary by trim, market, or body style. Checking by location makes replacement easier and reduces the chance of ordering the wrong bulb.
For best fitment, confirm the trim and lighting package on your LaCrosse before ordering, especially if your car has factory fog lights, daytime running lights, or a different rear lamp setup. Some positions may use halogen bulbs from the factory, while others may be changed to LED with aftermarket conversions, and LED replacements can affect brightness, color, and compatibility. If possible, remove the installed bulb and compare the base and markings before purchase, since the safest way to verify fit is to match the original bulb already in the vehicle.
FAQ
What is the low beam headlight bulb size for a 2009 Buick LaCrosse?
The low beam headlight bulb size listed for the 2009 Buick LaCrosse is H11.
What bulb does the high beam headlight use on this model year?
The high beam headlight bulb size listed for the 2009 Buick LaCrosse is H9.
What is the front turn signal bulb size on a 2009 Buick LaCrosse?
The front turn signal light bulb size listed is 4157NA.
What bulb size is used for the parking light?
The parking light bulb size listed for the 2009 Buick LaCrosse is 4157NA.
What are the rear brake light and outer tail light bulb sizes?
The brake light bulb size is 3057R, and the outer tail light bulb size is also 3057R.
What bulb does the rear turn signal use?
The rear turn signal light bulb size listed for the 2009 Buick LaCrosse is 3057.
What is the reverse light bulb size?
The back up reverse light bulb size listed is 921.
What bulb sizes are used for the dome and map lights?
The dome light and map light bulb sizes listed are 168 and 917.
What bulb fits the license plate light?
The license plate light bulb size listed is 194 or 7441.
What bulb is used in the glove box and courtesy lights?
The glove box light and courtesy light bulb sizes listed are 194 or 7441.
What is the trunk or cargo area light bulb size?
The trunk or cargo area light bulb size listed for the 2009 Buick LaCrosse is 912.
Does the 2009 Buick LaCrosse use LED bulbs anywhere?
Yes. The center high mount stop light is listed as LED, and some fog light and daytime running light setups may use H11 LED or H16 LED depending on the vehicle configuration.
Why should I check the installed bulb before buying replacements?
Because trim and lighting package differences can change the bulb used in a given position. Comparing the installed bulb helps confirm the base, shape, and markings before you order.
Can aftermarket LED bulbs be used in place of halogen bulbs?
Often yes, but fitment and performance can vary. Make sure the LED bulb matches the socket and is suitable for the housing, since some conversions may need additional compatibility checks.