This is a 1999 Bravada with SmartTrak . I have been all over the web looking for a simular problem but most have a different twist. Either they have AWD always engaged or blown fuses or the lights on. Mine isn't any of these. The light does not come on at start up like the others. The fuses aren't blown and it won't engage. I took both fuses out for a period of time to try to reset it and nothing changed. When taking the fuse out and turn the key the light still does not come on . I disconnected the battery all night for a possible "wake up" but still nothing. It's almost like it isn't noticed at all. Could this be in sleep mode or a bad connection ?
Thanks