abaird

Hey fellas, new here. I'm looking at a 2003 Silverado SS here in Nebraska with 41k miles on it. The price seems pretty good but it does snow here so I am wondering how these things do on icy roads(city driving). I have a 97 Z71 now. I know they are all wheel drive but I have never owned an all wheel drive truck so I am curious. Also, what kind of gas mileage can I expect to get? I'm not too worried about it as long as it isn't any worse than the truck I have now. Thanks Andy