Cadillac CTS 2009 Bulb Size
Bulb size chart
If you need bulb sizes for the 2009 Cadillac CTS, this page is designed to help you match the correct light by position, not just by a general guess. The CTS could use different bulbs depending on trim, lighting package, market, and body style, so checking the exact location is the best way to confirm fitment before you buy.
Use the bulb chart for the 2009 Cadillac CTS to verify common exterior and interior bulbs such as headlights, fog lights, tail lights, brake lights, reverse lights, license plate lights, map lights, and more. That makes it easier to replace a single failed bulb or plan a full lighting upgrade with the right size the first time.
Fitment can vary on the 2009 Cadillac CTS, especially between halogen and HID-equipped cars, and between standard and optional lighting packages. Some positions may use LED assemblies or LED-compatible replacements, while others use traditional halogen bulbs or specific base types. If you are considering aftermarket LED conversions, make sure the bulb matches the socket, polarity, and available space inside the housing, since not every LED retrofit will fit or perform correctly. For the most reliable result, compare the bulb listed for your position with the bulb already installed in the vehicle before ordering.
FAQ
What bulb does the 2009 Cadillac CTS use for the low beam headlights?
The listed low beam headlight bulb for the 2009 Cadillac CTS is H11 on applicable halogen-equipped models. Some versions may use a different headlight setup, so check the installed bulb and the vehicle’s lighting package before purchasing.
What bulb is used for the high beam headlights on the 2009 CTS?
The listed high beam headlight bulb is H9 on applicable models. If your CTS has a different headlight system, such as HID equipment, the bulb type may differ from the standard halogen setup.
Does the 2009 Cadillac CTS use D1S bulbs?
Yes, a D1S headlight bulb is listed for 2009 Cadillac CTS models with a high beam and low beam HID-style setup. This does not apply to every CTS, so confirm your exact headlight configuration first.
What are the front fog light bulb options for the 2009 CTS?
The front fog light bulb listings include H11 LED and H16 LED. The correct option depends on the specific fog light housing used on your CTS.
What bulb size is used for the rear turn signal on the 2009 Cadillac CTS?
The rear turn signal bulb is listed as LED for the 2009 Cadillac CTS. Since the assembly may be LED-based, replacement can involve the lamp unit rather than a simple replaceable filament bulb.
What bulb does the rear backup or reverse light use?
The rear back up reverse light bulb is listed as LED. Check the exact rear lamp design on your CTS, because some LED lighting setups are not serviced with a standard plug-in bulb.
What bulb is used for the license plate lights?
The license plate light bulb is listed as 2825 or 98. These are common small wedge-style bulbs used in many Cadillac applications.
What bulb size fits the parking lights on the 2009 CTS?
The parking light bulb is listed as 2825 or 98. As with other exterior bulbs, verify the socket and housing before ordering, since trim differences can affect fitment.
What bulb is used for the front side marker light?
The front side marker light bulb is listed as 194NA. This is a specific amber-style application for the front marker position on the 2009 Cadillac CTS.
What bulb is used for the rear side marker light?
The rear side marker light bulb is listed as LED. Because this position may be integrated into an LED lamp assembly, replacement can differ from a standard removable bulb.
What interior bulbs are listed for the 2009 Cadillac CTS?
Interior bulb listings include 2825 or 98 for the dome light, 906 for the glove box light and interior door light, 2886X for the stepwell light, 6612F for the vanity mirror light, 211-2 for the trunk or cargo area light, and PC175 for the map light.
Can I switch the 2009 Cadillac CTS bulbs to LED?
Some positions already use LED or LED-style lighting, and others can be converted to LED with the correct replacement. However, LED conversions must match the socket, fit inside the housing, and work with the vehicle’s electrical system to avoid issues like flicker or warning messages.
Why should I check the installed bulb before buying a replacement?
Because the 2009 Cadillac CTS can vary by trim, market, and body style, the bulb listed for one version may not match another. Checking the installed bulb helps confirm the exact size, base, and lighting type before you order.
Are the CTS coupe, sedan, and wagon guaranteed to use the same bulbs?
No. Body style can affect lighting equipment and bulb fitment on the 2009 Cadillac CTS. Always verify the bulb position on your specific vehicle rather than assuming every CTS uses the same part.