Buick LaCrosse 2011 Bulb Size
Bulb size chart
This 2011 Buick LaCrosse bulb size guide is designed to help you verify the correct bulbs by lighting position before you buy replacements. Whether you are changing a headlight, a brake light, or a small interior lamp, matching the bulb to the exact location is the easiest way to avoid fitment mistakes.
Because trim level, lighting package, and market can change the equipment on a 2011 LaCrosse, the bulb chart should be used as a position-by-position reference. It covers exterior, interior, and cargo-area bulbs so you can quickly narrow down the right size for your specific vehicle.
For best results, compare the bulb listed for your lighting position with the bulb already installed in the car, especially if your LaCrosse has different trim or an optional package. Halogen and HID setups use different parts, and some owners choose LED replacements for brighter output or longer life, but aftermarket conversions may need the correct bulb type, polarity, or additional adapters to work properly. Before ordering, check the existing bulb base and any markings on the old bulb so you can confirm the fit and avoid buying the wrong version.
FAQ
What bulb does the 2011 Buick LaCrosse use for the low beam headlight?
The low beam headlight bulb listed for the 2011 Buick LaCrosse is H11. If your car has a different lighting package, verify the installed bulb before replacing it.
What is the high beam bulb size on a 2011 LaCrosse?
The high beam headlight bulb is H9 on the 2011 Buick LaCrosse. This is the standard high beam bulb size shown on the chart for this model year.
Does the 2011 Buick LaCrosse use the same bulb for both high and low beams on any trims?
Some versions may use a D1S setup for the headlight bulb high beam and low beam, depending on the lighting package. That is why it is important to confirm the exact headlight system on your car before ordering.
What bulb is used for the front fog lights?
The front fog light bulb listing for the 2011 Buick LaCrosse is H11 LED or H16 LED. The correct choice can depend on the original lamp housing and the type of conversion you are using.
What are the daytime running light bulb options?
For LaCrosse models with halogen headlights, the daytime running light bulb is listed as H11 LED or H16 LED. For models with HID headlights, the daytime running light bulb is listed as 3157.
What bulb size is used for the front turn signal and parking light?
The front turn signal light bulb and the parking light bulb are both listed as 3757A on the 2011 Buick LaCrosse.
What bulb does the rear turn signal use?
The rear turn signal light bulb is listed as 3757A. This same bulb family is also used for some other front lighting positions on this model.
What bulb is used for the rear side marker light?
The rear side marker light bulb is listed as LED on the 2011 Buick LaCrosse. Since the chart identifies it as LED, check the exact lamp assembly if you are replacing the entire unit or only the light source.
What bulb size is used for the reverse lights?
The back up reverse light bulb is 921 on the 2011 Buick LaCrosse.
What interior bulbs fit the dome light, glove box, trunk, and stepwell lights?
Those interior positions are listed with 2825 or 98 for the dome light, license plate light, and interior door light, while the glove box light, trunk or cargo area light, and stepwell light are listed with 194 or 7441. Always confirm the socket style if your vehicle has been modified or previously repaired.
What bulb is used for the license plate lights?
The license plate light bulb is listed as 2825 or 98. Either size may appear depending on the exact lamp assembly or market configuration.
What bulb fits the vanity mirror light?
The vanity mirror light bulb is listed as 7065 for the 2011 Buick LaCrosse.
How do I know which bulb chart row applies to my LaCrosse?
Use the lighting position first, then match it to the chart row for your car. For example, a headlight bulb is not the same as a fog light bulb, even if both are in the front of the vehicle. Trim and lighting package can also change the correct bulb.