GMC Sierra LED Halos Switchback 16-18 Sierra 1500 Diode Dynamics Porsche 921 T15 Xtreme LED: Xtreme

921 T15 Xtreme LED: Xtreme LED 921 T15 ceramic LED Replacement bulbs feature a perfectly positioned CREE MHB-A LED emitter to maximize the use of your tail light optics making them a truly functional reverse / back-up LED light upgrade

Discouraged when the search returns no more than the same old variety of el-cheapo options out there

When you purchase: a GTR Lighting HID conversion kit for your vehicle you're getting the best of the best in terms of wire harness

and won't void your factory warranty

These LED bulbs will replace any T10 bulb

GMC Sierra LED Halos Switchback 16-18 Sierra 1500 Diode Dynamics Porsche 921 T15 Xtreme LED: XtremeTime for an upgrade! From the factory, the Sierra comes with a white C shaped DRL that from certain angles can look segmented and distorted. Diode Dynamics is excited to release our HD LED Halos for the 2016 2018 GMC Sierra that provides a much brighter, more uniform appearance compared to the factory optics. These computer designed LED Halos are circuit boards that align perfectly behind the factory diffusing reflector. Available in switchback and