Hello I'm new here. I just picked up a 2000 Blazer lt. I'm sorry if this was answered before. I'm bad at searching online. The odometer and shift indicator works when the truck is not running but if I turn the key to on or turn the truck on it disappears. Also another issue I'm having is the fuel gauge and the water temperature gauge are not working at all. I read it's a common issue with the Blazers but this seems to be something different I can't find anywhere online.