2014-2021 GMC Sierra Red LED Rear Turn Signal Bulbs With Built-in Resistor, No Hyperflash (PAIR)

Underground LED bulbs can last significantly longer than incandescent bulbs. They can provide up to 50,000–100,000 hours of service, while this GMC Sierra bulb also uses a cooling fan and full-metal heatsinking to manage heat and support longer operating life.

Yes. The listed fitment includes 2015-2021 GMC Sierra 2500 and 3500 models for the specified rear application.

Yes. These bulbs fit the listed 2014-2021 GMC Sierra 1500 rear brake and turn signal application.

The 2014-2021 GMC Sierra Red LED Rear Turn Signal Bulbs cost $64.99 for a pair. They provide rear brake, parking, and turn signal functions, with built-in resistors to prevent hyperflash and no extra resistors required.

The bulbs have built-in resistors for the listed rear turn signal circuit, so you don't need separate external resistors.

No. Each GMC Sierra LED Rear turn signal bulb comes with a built-in resistor for the turn signal application. You don’t need a separate resistor or flasher relay.

Each Underground Lighting GMC Sierra LED turn signal bulb produces 1600LM and uses 12 deep red 1860-style LED chips. The chips spread light in a 360-degree pattern, creating a brighter, deeper red output than the factory incandescent bulb. This makes your rear turn signals much more noticeable while matching the red rear lens.

The 360-degree lights mean 12 deep red 1860-style LED chips are arranged around the bulb to spread light in multiple directions. This provides more consistent illumination across the Sierra’s rear reflector instead of concentrating light in one direction. The result is a fuller red light pattern from both the rear turn signal and brake light. 

Red LEDs better match your Sierra's red rear lenses because they produce red light directly. The deep red output works naturally with the factory lens, giving the rear lights a cleaner and richer red appearance.

You can replace a single non-functional bulb, but Underground Lighting suggests replacing both bulbs in a pair. Doing so will give your rear lights matching color and output.