YUANTUO LED Tail Light Assembly for Cadillac ATS 3.6L 2018 & XTS 3.6L 2013-2017 — 2‑Piece, Multi‑Function LED Rear Lamps

YUANTUO two-piece LED tail light assembly replaces the rear brake, turn, position, and reverse bulbs on Cadillac ATS 3.6L 2018 and XTS 3.6L 2013–2017 models for brighter, more reliable rear lighting.

These two LED tail light units are engineered as direct-fit replacements for damaged or underperforming factory rear lamp modules. Constructed from aluminum and durable plastic and using high-efficiency LED diodes, the assemblies deliver clearer illumination, faster response time, and lower power draw compared with conventional bulbs. Available in silver, black, or red finishes, the set includes both left and right units and matches OEM mounting points and electrical connectors for straightforward installation.

How do these LED assemblies improve visibility and safety?

The LED modules combine brake, tail/position, turn signal, and reverse functions into a single compact unit, producing a uniform and quick-reacting light output. Brighter LED illumination helps other drivers detect braking and turning sooner, while rapid activation reduces reaction delay at the rear of the vehicle.

• Integrated multi-function design for consistent light alignment
• Faster response time than incandescent bulbs for turn and brake signals
• High-brightness diodes for clearer night and daytime visibility

Will these units fit my Cadillac ATS or XTS exactly?

YUANTUO units are made to match factory fitment for Cadillac ATS 3.6L 2018 and Cadillac XTS 3.6L model years 2013 through 2017. They correspond to OEM part numbers 13579168 and 84198978, so compatibility hinges on those numbers and the vehicle’s rear lamp configuration.

• Direct replacement for specified model years and engine configurations
• Matches OEM mounting points and connector types for plug-and-play installation
• Confirm your vehicle’s part numbers or consult a fitment guide before ordering

What materials and technology are used, and how long will they last?

The assemblies combine an aluminum substructure with impact-resistant plastic housings to balance heat dissipation and structural durability. Using modern LED diodes reduces energy consumption and extends operational life compared with traditional filament lamps.

• Aluminum for thermal management and structural strength
• Plastic outer housing for weather resistance and impact protection
• LED light source for lower power draw and longer service life

Is installation difficult and what should I check before fitting?

Installation is designed to be straightforward for technicians and experienced DIYers because these are direct replacements with matching connectors. Still, double-check fitment and inspect sockets and wiring for damage prior to installation to prevent fit or electrical issues.

• Plug-and-play connectors intended to align with factory harnesses
• Verify vehicle part numbers (13579168, 84198978) before purchase
• Inspect mounting points and wiring harness for corrosion or worn pins

Who is this for: Drivers of Cadillac ATS 3.6L (2018) or XTS 3.6L (2013–2017) who need a reliable, brighter replacement for damaged or aging rear lamp modules. This two-piece YUANTUO kit is suited to owners wanting OEM-style fitment with upgraded LED performance, garages and mechanics seeking a straightforward swap, and anyone replacing both left and right tail assemblies at once. If you’re unsure about compatibility, compare your current rear assembly’s part number to 13579168 or 84198978 or contact seller support for help before ordering.