A special Sierra Spec HD Relay Harness is designed to make your Sierra install piece of cake. Double-sealed 40A relays and 14-gauge stranded copper wire wrapped in durable black tech-flex mesh are completely new features that ensure the wire harness meets and exceeds the looks and quality of the factory parts it's replacing. No cutting, no splicing, no mess, and no stress. There are only five connections, and each of them is plug-n-play. Most importantly, the harness includes the proper capacitor to absorb and smooth out the pulsed signal from the factory Sierra fog light circuits.
The all-new XB ballasts included in this HID lighting system offer the perfect blend of function and style with an industrial-edge design and state-of-the-art technology. Morimoto moved the igniters closer to the HID bulb to mimic OEM and further away from the circuitry to reduce EMI/RFI radio interference and eliminate failures and misfires.
9012 XB Bulbs.
Let's face it: the Sierra is a great truck, but the stock fog lights suck! We hear it all the time from late model Sierra owners. The XB 9012 HID bulbs give a bright, color accurate, and intense beam that will last as long as far more expensive OEM alternatives.