【High Beam, Low Beam and Fog Lights on Together】:When turning on the high beams, the low beams, high beams and fog lights can be activated simultaneously, which is very suitable for night driving and harsh weather conditions such as heavy fog and rain. 【Extended Functions】:If you want to turn on other lights at the same time, such as daytime running lights,profile lights, grille lights, etc.you can connect the diode harness assembly inside the package to the expansion pins of the circuit board, relays and fuse boxes, you can turn on the new lights at the same time to meet the various lighting needs of your daily driving. 【Upgrade Double-Sided Circuit Board】:The 6 High Mod adopts a double-sided circuit board design. Compared to other single-sided circuit boards, our double-sided circuit board has the characteristics of high precision, fast transmission, and stable current, greatly improving product performance. It is made of FR-4 PCB material and has good electrical insulation, mechanical strength, and heat resistance. 【Fitment】:Compatible with Chevrolet, Avalanche 1500/2500 2003-2006, Silverado 1500 HD 2003, Silverado 1500/2500/3500 Classic/ HD Classic 2007;Fits for GMC, Sierra 1500/2500 HD 2003-2007, Sierra 3500 2003-2006 , Sierra 2500 2003-2004 , Sierra 1500 HD 2005-2006, Yukon 2004-2006, 1500 Classic/1500 HD Classic/2500 HD Classic/3500 Classic/3500 HD 2007, Sierra 1500 HD 2003;Fits for Cadillac, Escalade 2004-2006, Escalade EXT 2003-2006;Fits for GMT800, 2003-2007 GMT 800 trucks. 【Easy to Operate】:This lamp mode adopts an integrated design, which is plug and play. Simply place the module in the correct position and then return the relay to the corresponding position to complete the installation. 【Package Includes】:1X H-L-F circuit board, 2X Diode Harnesses, 2X Splices,1X instructions. Fitment
Compatible with Chevrolet
For Avalanche 1500/2500 2003-2006
For Silverado 1500 HD 2003
For Silverado 1500 Classic/ HD Classic 2007
For Silverado 2500 HD Classic 2007
For Silverado 3500 Classic/3500 HD 2007

Compatible with GMC
For Sierra 1500/2500 HD 2003-2007,
For Sierra 3500 2003-2006 ,
For Sierra 2500 2003-2004 ,
For Sierra 1500 HD 2005-2006,
For Yukon 2004-2006,
For 1500 Classic/1500 HD Classic/2500 HD Classic/3500 Classic/3500 HD 2007,
For Sierra 1500 HD 2003;

Compatible with Cadillac
For Escalade 2004-2006
For Escalade EXT 2003-2006

Compatible with GMT800, 2003-2007 GMT 800 trucks.