Adaptive Equipment problems of the 2002 Chevrolet Suburban

I have a 2002 Chevrolet Suburban. I have had it for two years. I am having problems similar to what it's the gm recall. This doesn't happen everytime I drive. I can be driving down the street or on the expressway and my vehicle will just shut off and the battery light will come on. After sitting for a few minutes, the truck will start back up with no problem or without having any boost. I have been having this problem since I have had the vehicle and noone could ever tell me what the problem was. I think it is the ignition switch. Please assist me in finding out how I can get my truck fixed as I am a mother of 4 and that is my only means of transportation. I am blessed for having not being in a fatal accident or accident period due to this problem since I have had this vehicle. Thanks.