Kool Vue SET-GM259ER Power Folding Heated Towing Mirror Set with In-Glass Signal, Spotlight & Marker Light

The Kool Vue SET-GM259ER is a complete driver and passenger side towing mirror set designed as a direct OEM replacement for 2017–2019 Chevrolet Silverado 2500 HD and 3500 HD and GMC Sierra 2500 HD and 3500 HD trucks. Engineered to match factory specifications, this pair restores full mirror functionality without modification.

This set features the trailer-type, vertically extended mirror housing with manual telescoping extend/retract capability, allowing you to quickly adjust mirror width when hitching or unhitching a trailer. The power-adjustable glass and power folding mechanism are controlled from the factory mirror switch. A memory function is included, enabling the mirrors to return to your saved position automatically.

Key Features:

• Sold as a Set — Includes both right-hand (RH) and left-hand (LH) mirror assemblies
• Power Adjustment — Electrically adjustable mirror glass via factory controls
• Power Folding — Mirrors fold in and out with the push of a button
• Heated Glass — Integrated heating element clears frost, ice, and condensation
• Manual Extend (Telescoping) — Slides outward for improved trailer visibility
• Memory Function — Mirrors return to driver-programmed positions automatically
• In-Glass Turn Signal — Integrated signal light within the mirror glass for enhanced visibility
• Spotlight / Puddle Light — Downward-facing spotlight for entry and ground illumination
• Marker Light — Side-facing clearance/marker lamp integrated into the mirror housing
• Textured Black Finish — Matches the factory OEM appearance on applicable trim levels
• OAT (Outside Ambient Temperature) Sensor — Passenger-side mirror includes the factory temperature sensor
• Trailer-Type Housing — Tall, vertical towing mirror profile for maximum rearward visibility when towing

This mirror set replaces OEM part numbers 84228899, 84085353, 84228901, and 84685340 (846 prefix). Each mirror is designed to plug directly into the factory wiring harness, utilizing existing vehicle options. Note: features such as power folding, heating, memory, signal, spotlight, and OAT sensor will only function if the vehicle was originally equipped with those options.