Instrumentation and Controls. . . 128Operating TipsBefore using the air conditioningsystem, open the windows for afew minutes to permit hot air toescape. Close the windows whenusing the air conditioning system.Clear away any ice, snow, or leavesfrom the air inlets at the base ofthe windshield that could blockthe flow of air into the vehicle.Keep the area under the front seatsclear of objects to help air circulatethrough the vehicle.Only use GM-approved hooddeflectors on your vehicle.Check with your dealer beforeadding equipment to the outsideof your vehicle.Rear Window DefoggerPress to defog your rearwindow. The defogger turns offby itself after approximately15 minutes if your vehicle is travel-ling at slower speeds. At higherspeeds, the rear defogger may runcontinuously.If the defogger is reactivatedimmediately after completion ofthe initial cycle, it will only run forten minutes at a time.The engine must be running inorder for this feature to work.You can also turn the defogger offby turning off the ignition or press-ing the button again.The outside mirrors are heatedevery time the rear defogger isactivated.This feature helps to clear fog andfrost from the surface of themirror.$10araCTS Page 128 Tuesday, September 15, 2009 12:30 PM