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Your cart is empty.Fit for : Chevrolet Silverado 2003-2007, Chevrolet Avalanche 2003-2006, Chevrolet Suburban 2003-2006, Chevrolet Tahoe 2003-2006, Chevrolet Trailblazer 2002-2009, GMC Yukon 2003-2006, GMC Envoy 2002-2009, GMc Sierra 2003-2007, Cadillac Escalade 2003-2006, 0ldsmohile Bravada 2002-2004, Hummer H2 2003-2007, Buick Rainier 2004-2007 Installnation Step: 1.Press and hold the power and front defrost buttons,until the LCD screen displays a configuration number,The fault configuration number is 4.(Select the appropriate Vehicle Applications according to the code). 2.Use the on screen table to select your vehicles application configuration number. 3.Once the number is located, use the fan up or fan down buttons to select yourconfiguration number. 4.The first digit on the display will change to a 5 indicating the configuration needs to be set 5.Now that the desired configuration is displayed press and release the recirculation button 6.The first digit will change back to a zero indicating the configuration has been set 7.Next, press and release the auto button to confirm this selection 8.Finally, wait while the system performs a calibration sequence and front defrost button lamps being illuminated 9.This may take up to a minute to fully calibrate 10.Once one or both of the lamps turn off, the configuration is complete.