I'm having problems with my block heater on my 99' Blazer, it doesnt seem to be drawing power when it's plugged in. It was working about 3 weeks ago but has since stopped working! Could this just be a blown fuse? I tried cleaning the plug off with a wire brush last week cause it looked kind of corroded so i figured it might be a connection problem, but this did not help me out at all. It's -40 to -50 out this week with the windchill where i live, so this is kind of a major problem as my truck sits outside 24/7 in the cold. Any help or suggestions at all would be greatly appreciated!