Buick LaCrosse 2005 Bulb Size
Bulb size chart
This page covers the 2005 Buick LaCrosse and helps you verify the correct bulb size by lighting position, so you can match the right lamp to the right socket before you buy. Because bulb fitment can change with trim, market, and body style, it is best to confirm each location separately instead of assuming every light uses the same part.
Use the bulb chart on this 2005 Buick LaCrosse page to check common exterior and interior lights such as the low beam, high beam, fog light, brake light, turn signal, reverse light, dome light, map light, and license plate light. That makes it easier to replace a burned-out bulb quickly and avoid ordering the wrong size.
For the best fit, compare the chart with your specific LaCrosse trim and lighting package, since some positions may differ by market or equipment level. If you are switching from halogen to LED, remember that the bulb may fit physically but still need a compatible LED replacement, and some aftermarket conversions can affect beam pattern, brightness, or warning messages. Before placing an order, it is smart to remove the installed bulb and read the number on the base, especially for exterior lamps where previous repairs or regional differences may have changed the original setup.
FAQ
What is the low beam bulb size for a 2005 Buick LaCrosse?
The low beam headlight bulb listed for the 2005 Buick LaCrosse is H11.
What bulb does the high beam use on this model year?
The high beam headlight bulb for the 2005 Buick LaCrosse is H9.
Which bulb fits the front turn signal and parking light?
Both the front turn signal light and the front parking light use 4157NA on this page.
What is the brake light bulb size on a 2005 Buick LaCrosse?
The brake light bulb listed is 3057R.
What bulb is used for the outer tail light?
The outer tail light bulb is 3057R.
What bulb fits the rear turn signal?
The rear turn signal light bulb is 3057.
What are the reverse light bulb sizes?
The back up reverse light bulb is listed as 921.
What bulb is used for the dome and map lights?
Both the dome light and map light use 168 or 917.
What bulb fits the license plate light?
The license plate light bulb is 194 or 7441.
What bulb is used for the glove box and courtesy lights?
The glove box light and courtesy light both use 194 or 7441.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light uses 912.
What bulb is listed for the vanity mirror light?
The vanity mirror light bulb is 7065.
What are the fog light and daytime running light bulb options?
The front fog light and daytime running light are listed as H11 LED or H16 LED, depending on the vehicle setup.
Do trim and market differences matter on the 2005 Buick LaCrosse?
Yes. Trim, lighting package, market, and body style can affect bulb fitment, so it is important to check the exact position on your vehicle.
Should I verify the installed bulb before ordering?
Yes. Checking the installed bulb is the safest way to confirm fitment, especially if the car has been repaired, modified, or converted to LED.