The Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 from Nomadic Supply Company® delivers a dramatic upgrade in daytime and nighttime visibility over the factory optics, using proprietary high-density LED technology engineered specifically for the Sierra 1500. Whether you’re looking for a cleaner DRL appearance, a functional switchback turn signal, or simply more presence on the road, the DD2177 LED Halos provide an OEM-quality aesthetic with measurably superior performance.
The Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 are built around Diode Dynamics’ custom HDLED modules, which pack over 700 LED chips behind a diffusing gel to eliminate the segmented, uneven look common to factory halo rings. The result is a smooth, continuous ring of light that looks clean and stock when off — yet commands attention the moment it powers on. With both white DRL and amber turn signal functions packed into a single, purpose-built unit, the DD2177 adds genuine functionality to go along with its refined appearance.
Installation of the Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 requires opening the headlamp housing, and professional installation is recommended to ensure a proper seal and reliable long-term performance. Diode Dynamics backs the DD2177 with a three-year replacement limited warranty and has confirmed the halos produce no electrical issues on compatible Sierra 1500 applications — giving you confidence from the moment the headlamps close back up.
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Features:
- Computer-Designed LED Halos: Engineered specifically for the 2016-2018 Sierra 1500, these halos deliver a huge increase in brightness over the factory optics — remaining clearly visible even in direct sunlight.
- More Uniform Output: An upgrade from segmented factory optics; the circuit boards align perfectly behind the factory diffusing reflector for a smooth, consistent glow across the entire ring.
- Designed and Assembled in the U.S.A.: The DD2177 LED Halos are designed and assembled in the United States.
- Switchback Turn Signal Functionality: Available in switchback and functions as an additional front turn signal for a custom, yet functional look.
- Proprietary High-Density ‘HDLED’ Technology: Modules are populated with over 700 LED chips, coated by a diffusing gel, resulting in a perfectly uniform light when turned on and a clean, OEM appearance when off.
- Custom-Designed Waterproof Drivers: Feature transient voltage suppression, reverse protection, and a switching driver for extremely high reliability over time.
- Embedded Microcontroller with Multi-Stage PWM Dimming: Utilizes multi-stage PWM dimming — half-brightness for parking lights at night, full-power for DRL during the day.
- High-Power Amber Turn Signal: The amber turn signal runs at even higher power, making it easily visible in broad daylight.
- T-Tap Connectors Included: Includes T-tap connectors for connection to ground, parking signal, DRL, and turn signal on each side.
- Headlamp Opening Required: Headlamps must be opened for installation; professional installation is recommended.
- Denali Trim Note: On certain Denali trim levels, the DRL is pin 8 and the Parking light is pin 6.
- Wire Colors — Left Side (Driver Side in US): Low Power (50% Brightness): Blue/Gray; High Power (100% Brightness): Violet/Gray; Turn Signal: Blue/White; Ground: Black.
- Wire Colors — Right Side (passenger side in US): Low Power (50% Brightness): Blue/Brown; High Power (100% Brightness): Violet/Gray; Turn Signal: Green/Violet; Ground: Black.
- No Electrical Issues: Tested and confirmed to produce no electrical issues on compatible applications.
- 3-Year Replacement Limited Warranty: Quick troubleshooting and replacement are provided — no need to wait for a return and repair process.
- Not compatible with 2016-2018 GMC Sierra 2500 or 3500.
- On certain Denali trim levels, the DRL is pin 8 and the Parking light is pin 6.
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Compatibility:
- 1500 2016-2018 GMC Sierra
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Includes:
- Two (2) application-specific LED Halos
- Two (2) waterproof drivers
- Two (2) input wire pigtails with T-taps
- Installation guide
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Specifications:
- Measured Lumens: 670
- Color Temp (CCT): 2000K, 6000K
- Power (Watts): 11.65
- Operating Voltage: 9-16V
- Current (Amps @ 13.2V): .910
- Operating Temperature: -40C to 85C (-40F to 185F)
- LED Emitter: Custom-Manufactured
- Connector(s): JST Inline Connectors, T-Tap Inputs
- Driver Features: External, Waterproof, Constant Current
- Materials: FR4 PCB
- Cooling: Passive, no heatsink
- Product Dimensions (in): 14.25 x 8.75 x 2.25
- Application: DRL
- Make: GMC
- Model: Sierra 1500
- Years: 2016, 2017, 2018
- Electrical Compatibility: No electrical issues (tested and confirmed)
- Quantity: Pair (Left and Right Side)
- Installation Time: 1-2 hours
- Modification: Open and Reseal Lamp
- Installation Tools: Phillips screwdriver and double-sided adhesive or epoxy
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Documents:
Diode Dynamics DD2177 LED Halos for 2016-2018 GMC Sierra 1500 Installation Guide
