2019 Cadillac CTS Bulb Size

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Bulbs Chart

Headlight Bulb High Beam and Low Beam - D3S

License Plate Light Bulb - 2825

Back Up Reverse Light Bulb - 921

Dome Light Bulb - 2825


2019 Cadillac CTS Headlight Bulb High Beam and Low Beam (D3S)

    Xenon HID Conversion Kit

  • Best Choice

    Philips D3S Standard Authentic Xenon HID

    Xenon HID lights deliver better light but consume less power. This offers drivers enhanced visibility while allowing the vehicle to save electrical power for other functions. With twice the amount of light, you can see potential obstacles much sooner. At highway speeds, HID lights give you up to a full

See more D3S Xenon HID Conversion Kit

    LED Lights

  • Extremely Bright

    VehiCode D3S LED Headlight Conversion Kit - Xenon Replacement

    Looking for an LED conversion kit that will perfectly replace your OEM D3S D3R D3C Xenon bulb without changing any wiring? Look no further than the VehiCode D3S LED Headlight Conversion Kit. Each all-in-one LED conversion light lamp features mute fan cooling and CAN-bus error decoding, making installation a breeze.

See more D3S LED Lights

2019 Cadillac CTS License Plate Light Bulb (2825)

    LED Lights

  • Premium Pick

    Sylvania White Mini Bulb

    SYLVANIA LED bulbs deliver a balanced combination of performance and value. Tuners and auto enthusiasts alike can replace their vehicle’s incandescent lights with a bright and long-lasting LED bulb for a unique and modern look simply and cost-effectively. 
  • For Car Dome, Map Door, Courtesy, License Plate Lights

    Marsauto LED Light Bulb 6000K Replacement Bulbs

    – Better beam pattern: each bulb has 5 pcs high power SMD led, color temperature: 6000K(xenon white), voltage: 12V – No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.  Products with electrical plugs

See more 2825 LED Lights

2019 Cadillac CTS Back Up Reverse Light Bulb (921)

    LED Lights

  • Best Choice

    Philips 12789LPB2 Bright White Vision

    Replace your standard car lights with our robust Philips Vision LEDs that deliver dynamic lighting for your vehicle, both inside and out. The innovative design and unmatched performance of Philips Vision LEDs are available for brake and taillights, backup lights, dome lights, and license plate lights. These bulbs are covered

See more 921 LED Lights

2019 Cadillac CTS Dome Light Bulb (2825)

    LED Lights

  • Premium Pick

    Sylvania White Mini Bulb

    SYLVANIA LED bulbs deliver a balanced combination of performance and value. Tuners and auto enthusiasts alike can replace their vehicle’s incandescent lights with a bright and long-lasting LED bulb for a unique and modern look simply and cost-effectively. 
  • For Car Dome, Map Door, Courtesy, License Plate Lights

    Marsauto LED Light Bulb 6000K Replacement Bulbs

    – Better beam pattern: each bulb has 5 pcs high power SMD led, color temperature: 6000K(xenon white), voltage: 12V – No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.  Products with electrical plugs

See more 2825 LED Lights

2019 Cadillac CTS Headlights

2019 Cadillac CTS Tail Lights

Cadillac CTS Bulb Size By Years

Goal: This bulb size chart helps you quickly identify the correct replacement bulbs for a 2019 Cadillac CTS, removing guesswork and saving time at the parts counter. I recommend using the chart as a reference before ordering, with the assumption that factory fitment is your baseline and any aftermarket choices are trade-offs between cost and longevity. Prerequisites and step by step: confirm the trim and headlamp package on your CTS, match the listed bulb types to the locations, and check socket style and wattage constraints before purchase. Validation comes from physically comparing the old bulb and testing the new one in place. Troubleshooting and wrap up: if a bulb does not fit or flickers, recheck the socket, polarity, and any CAN-bus compatibility. This page contains affiliate links; I may earn a small commission if you purchase through them, at no extra cost to you.

2019 Cadillac CTS specs
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