Cadillac CTS 2005 Bulb Size
Bulb size chart
This page lists the bulb sizes for the 2005 Cadillac CTS by lighting position, making it easier to confirm the correct replacement before you buy. Whether you are changing a headlight, tail light, parking light, or interior lamp, the goal is to match the bulb to the exact location on the vehicle.
The 2005 Cadillac CTS could use different lighting setups depending on trim, market, and body style, so it is important to verify each bulb separately. Use this guide to compare the installed bulb with the listed size for your specific CTS and avoid ordering the wrong part.
For best fitment, always compare your existing bulb to the chart before replacing it, especially if your CTS has halogen headlights, HID low beams, or an optional lighting package. Some owners choose LED replacements for brighter output or longer life, but LED bulbs may require additional parts or may not work correctly in every housing. Aftermarket conversions can also change beam pattern, warning behavior, or bulb compatibility, so check the complete setup before upgrading. If a light has been replaced before, the installed bulb may not match the original equipment listing, which is another reason to inspect the current bulb before purchase.
FAQ
What is the low beam bulb size for a 2005 Cadillac CTS with HID headlights?
The low beam bulb size for 2005 Cadillac CTS models with HID headlights is D1S.
What is the low beam bulb size for a 2005 Cadillac CTS with halogen headlights?
The low beam bulb size for 2005 Cadillac CTS models with halogen headlights is 9006XS.
What high beam bulb does the 2005 Cadillac CTS use?
The high beam bulb size listed for the 2005 Cadillac CTS is 9005XS.
What bulb is used for the front outer turn signal on this CTS?
The front outer turn signal light bulb is 2825, 98.
What bulb is used for the front inner turn signal on this CTS?
The front inner turn signal light bulb is 3157.
What bulb size fits the brake lights on a 2005 Cadillac CTS?
The brake light bulb size is 3157R.
What bulb size fits the tail lights on this model year?
The tail light bulb size is 3157R.
What bulb is used for the rear turn signal on the 2005 Cadillac CTS?
The rear turn signal light bulb size is 3157.
What bulb fits the back up reverse light?
The back up reverse light bulb size is 3157.
What bulb size is listed for the front side marker light?
The front side marker light bulb size is 194NA.
What bulb is used for the license plate light?
The license plate light bulb size is 2825, 98.
What interior bulb size is used for the dome light, map light, and center high mount stop light?
The dome light bulb, map light bulb, and center high mount stop light bulb are listed as PC175.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light bulb size is 211-2.
Are the bulb sizes the same on every 2005 Cadillac CTS?
Not always. Trim, lighting package, market, and body style can affect the exact bulb setup, so it is best to verify the bulb by position on your specific car.