Cadillac CTS 2011 Bulb Size
Bulb size chart
This 2011 Cadillac CTS bulb size guide is designed to help you verify the correct bulbs by lighting position, so you can replace the right part the first time. Whether you are changing a headlight, a brake light, or a small interior lamp, this page organizes the common bulb locations for the CTS in a simple, practical way.
The 2011 Cadillac CTS was offered with different trims, body styles, and lighting packages, so bulb fitment can vary by market and equipment. Use the bulb chart on this page to match the bulb to the exact location on your vehicle, especially if your CTS has factory LED lighting or an optional HID setup.
For best results, compare the bulb position on your car before ordering, since trim and package differences can change the correct fitment. Some 2011 CTS models use halogen bulbs in certain spots, while others may have LED or HID-related lighting that requires a different part number or assembly. If you are considering an aftermarket LED conversion, make sure the bulb base, depth, and connector style match the original housing, and check for beam pattern or warning-light issues. When possible, remove the installed bulb and confirm the markings on the base before buying replacements, especially for exterior lights that may differ between sedan and wagon configurations.
FAQ
What bulbs does a 2011 Cadillac CTS use for the low beams?
The low beam headlight bulb listed for the 2011 Cadillac CTS is H11 on many setups. Some versions may use a D1S system for combined high and low beam HID lighting, so check your existing headlight type before ordering.
What is the high beam bulb size for the 2011 Cadillac CTS?
The high beam bulb size listed is H9 for many CTS configurations. If your car has a D1S HID setup, the headlight arrangement may differ from the standard halogen layout.
What bulb fits the front fog lights on this model?
Front fog light fitment can vary on the 2011 Cadillac CTS. The listed options include 9145 LED, 9140 LED, H11 LED, H16 LED, and H8 LED, so confirm the exact lamp and housing before purchase.
What bulb is used for the front turn signal?
The front turn signal bulb listed for the 2011 Cadillac CTS is 12272NA. Always verify the socket and lens style, since front lighting can differ by trim or market.
What bulb size is used for the rear turn signal?
The rear turn signal bulb is listed as LED on this page. Because the rear lighting may be integrated differently depending on the CTS body style and package, it is important to match the existing lamp assembly.
What bulb do I need for the brake lights and tail lights?
The brake light bulb and tail light bulb are both listed as LED for the 2011 Cadillac CTS. These may be part of an integrated rear lamp assembly rather than a simple replaceable bulb in some versions.
What is the reverse light bulb size?
The back up reverse light bulb is listed as LED. Check the rear lamp assembly carefully, because some CTS trims use LED modules that are not interchangeable with standard halogen bulbs.
What bulb fits the license plate lights?
The license plate light bulb sizes listed are 2825 and 98. These are common small wedge-style bulbs used in several exterior courtesy applications.
What bulb is used for the dome light in the 2011 Cadillac CTS?
The dome light bulb is listed as 2825 and 98. Interior lighting can vary with equipment level, so confirm the bulb shape before replacing it.
What bulb fits the map lights and glove box light?
The map light bulb is listed as PC175, while the glove box light bulb is 906. The interior door light bulb is also 906 on this page.
What bulb is used for the trunk or cargo area light?
The trunk or cargo area light bulb listed for the 2011 Cadillac CTS is 211-2. This is a useful bulb to check if the cargo lamp has gone dim or stopped working.
What should I know before switching to LED bulbs?
Before converting a 2011 Cadillac CTS bulb location to LED, confirm that the bulb base, polarity, and physical size fit the housing. Some positions work well with LED upgrades, while others may need resistors, adapters, or a different assembly to avoid flicker or warning messages.