Parts & Accessories Special panel This panel is mainly used in models ((Chevrolet Silverado, Tahoe, GMC Yukon, Sierra, Cadillac Escalade, and Hummer H2)) produced from ((1995 to 2006)). Its function is to modify the lighting system to allow the high beam, low beam, and fog lights to operate simultaneously when the high beam is activated, which significantly improves visibility. It makes the high and low beams work together. Limit 120 SAR