GTMOTO D3S HID Bulbs for 2013-2017 Cadillac XTS — 6000K Bright White, 35W Plug-and-Play (Pair)

GTMOTO D3S bulbs are a direct-fit HID replacement that deliver a 6000K bright daylight beam and improved visibility for 2013–2017 Cadillac XTS headlight assemblies.

These D3S (D3S-C1) xenon bulbs are engineered as OE-style 35W / 42VAC high-intensity discharge replacements for compatible Cadillac XTS adaptive projector headlights. They are intended to swap into existing HID systems that use D3S bulbs (not halogen sockets) and work with your vehicle's ballast and wiring without modification. The set includes two bulbs in protective packaging and targets drivers who want a crisper, whiter beam around 6000K compared with older 4300K lamps.

Will these bulbs fit my 2013–2017 Cadillac XTS?

If your XTS uses factory D3S xenon capsules (common in premium and V‑Sport trims), these GTMOTO bulbs are a plug-and-play replacement. They are designed to the D3S-C1 footprint and electrical spec (35W, 42VAC) so they connect to original ballast hardware. Do not buy if your car uses conventional 12V halogen bulbs.

• Fits D3S / D3S-C1 HID sockets in compatible XTS headlamp units.
• Requires existing HID ballast (35W / 42VAC) — no extra ballast included.
• Not compatible with DC 12V halogen fittings like H11, H7, H1, 9006, HB3, HIR2.

How much brighter and whiter are these compared with stock bulbs?

These bulbs produce a cooler 6000K color temperature, yielding a noticeably whiter, daylight-like beam compared with many factory 4300K xenon bulbs. The manufacturer rates them around 1.5× the perceived brightness versus older or dim stock lamps, improving contrast and road definition in typical night driving. Brightness gains depend on reflector/projector design and lens clarity.

• Color temperature: ~6000K cool white for clearer color rendition.
• Estimated 1.5× perceptible brightness vs older 4300K units.
• Instant-on xenon discharge with short warm-up to top output.

What are the build quality and expected lifespan?

GTMOTO D3S bulbs are made with anti-UV laser-cut quartz glass for improved durability and consistent light output. The construction is targeted to last longer than basic bulbs and withstand typical road vibration. Manufacturer guidance cites service life measured in thousands of hours, though actual lifespan varies with use and operating conditions.

• Quartz glass with anti-UV treatment for lens protection.
• Durable xenon capsule design and protective packaging (2 bulbs).
• Quick-start gas discharge for consistent illumination at startup.

How easy is installation and what precautions should I take?

Installation is typically fast and simple — many users report completing the swap in about ten minutes per side without modifying the headlamp. Because these are HID capsules, handle them carefully and avoid touching the glass with bare hands. Confirm your vehicle uses D3S bulbs and the existing ballast is functioning before installation.

• Plug-and-play with OE-style D3S sockets — no cutting or rewiring required.
• Wear gloves or use a clean cloth to prevent oil contamination on the bulb glass.
• Do not fit into halogen-type fixtures; verify bulb code before purchase.

Who is this for: Drivers of 2013–2017 Cadillac XTS (and other vehicles specified for D3S bulbs) who want a whiter, brighter HID beam without replacing ballasts or retrofitting headlamp housings. Choose these bulbs if your vehicle already uses 35W D3S xenon capsules and you want a straightforward OE-style upgrade to approximately 6000K daylight color and improved visual clarity at night.