PWM Module: GTR Ultra 2.0 (Pair / H4/9003) GMC AlphaRex Design AlphaRex developed the

AlphaRex Design AlphaRex developed the Chevy Silverado HD PRO-series headlights based on its stock design and add a LED tube around the edge as DRL and sequential turn signal

OEM Quality: Philips 85126 : The industry standard by which all other D2R bulbs are measured

These bulbs have a safe and low-profile opaque white plastic shell around the LEDs to ensure no contact with metal electrical connections

and control -- making it the most effective off-road LED fog light in the world

PWM Module: GTR Ultra 2.0 (Pair / H4/9003) GMC AlphaRex Design AlphaRex developed thePulse Width Modulation: Is frequently found in the electrical systems that run the headlight circuit in many modern vehicles, and when it comes to HID or LED upgrades, that's a problem since it results in constant flickering on the new setup Do you need these? Not sure whether or not you'll need these when doing an upgrade on your vehicle? Check out the rule of thumb guide in the tech specs below for some information to help you make the best