GTMOTO D3S HID Bulbs for 2013–2017 Cadillac XTS — 6000K Daylight 35W Plug-and-Play

GTMOTO D3S bulbs are direct-replacement 35W HID high/low beam xenon lamps designed to restore and upgrade the factory HID headlights on 2013–2017 Cadillac XTS models.

If your XTS originally came with D3S xenon headlamps, these GTMOTO bulbs deliver a cooler, brighter 6000K daylight color and increased on-road visibility compared with older 4300K factory lamps. They are engineered to plug into the car's existing HID system (42VAC, D3S/C1 standard) and provide a crisp white beam that modernizes appearance and beam clarity without body modifications.

Will these bulbs fit my 2013–2017 Cadillac XTS?

These GTMOTO D3S bulbs are made specifically as OE-style D3S/C1 replacements and are compatible with Cadillac XTS HID bi-xenon projector systems from 2013 through 2017. They will not fit vehicles that use traditional 12V halogen bulbs.

• Fits D3S/C1 standard HID sockets used by many XTS models.
• Works with factory HID ballast and wiring (35W / 42VAC systems).
• Not compatible with DC 12V halogen systems (H11/H7/H1/HIR2 etc.).
• Double-check OEM bulb code before purchase to ensure match.

How much brighter and whiter is the light compared to stock?

GTMOTO D3S bulbs offer roughly 1.5× the perceived brightness of older 4300K xenon bulbs and a cooler 6000K color temperature for a crisp, daylight-white beam. This improves contrast at night and refreshes the headlight look without changing beam pattern.

• 6000K cool white output for clearer road detail and modern appearance.
• About 1.5× brighter than typical 4300K stock xenon bulbs.
• Faster visual clarity with a near-instant xenon arc start.
• Maintains original projector beam cutoffs when correctly installed.

How easy is installation and what are the durability expectations?

Installation is straightforward: these are OE-style D3S plug-and-play bulbs intended to fit into existing sockets in roughly ten minutes per side with no housing modifications. They are manufactured from anti-UV quartz glass and precision components to provide long life under normal driving conditions.

• Approx. 10 minutes per bulb for fast replacement without adapters.
• Laser-cut, anti-UV quartz glass construction for durability.
• Expected service life around 3,000+ hours depending on usage.
• Includes a two-piece set (left and right) for full headlight upgrade.

Are there any compatibility cautions or installation tips?

These bulbs require an HID ballast and are not a replacement for halogen or LED retrofit kits. Verify your XTS uses D3S 42VAC HID bulbs before ordering and avoid using in 12V halogen sockets or non-compatible headlamp systems.

• Only for 35W HID D3S/C1 systems; not for DC 12V halogen lamps.
• Do not install if your vehicle uses H11/H7/H1 or HIR2 halogen bulbs.
• Keep connectors clean and secure to avoid flicker or error codes.
• If you see dashboard HID errors, an anti-flicker adapter or compatible ballast may be needed.

Who is this for: GTMOTO D3S bulbs are aimed at Cadillac XTS owners (2013–2017) who want a direct, OE-style HID replacement that brightens and whitens their headlamps without altering the beam geometry. Choose these bulbs if your car already has a D3S xenon system and you want improved night visibility, a refreshed factory look, and a hassle-free swap that fits existing HID ballasts.