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Vehicle Specific Kit HERE: headlightrevolution.com/14-15...
The 14-15 Sierra with projector headlights can be a tricky vehicle to install aftermarket headlight bulbs into due to it's use of PWM and CANBUS systems to monitor and control the headlight functions. Now by using the all new GEN 5 HID conversion kit from GTR Lighting it's a simple plug and play install!