2000 Chevrolet Blazer electrical system problems

4/8 I was driving the car and it just died out as if it was out of gas. There was still power to the radio/lights ect. The engine would crank but not kick over. The engine would not rev upon pressing the accelerator. It was taken to dlr chevy73 by GM roadside assistance. On 4/9, around 2:30pm I spoke w/ carolyn tirelli-service advisor, who at first said there was not word of the repair. Then stated she saw the tec pulling the vehicle out of the service bay.

It started with my gauges bouncing all over going on and off , then it felt like the brakes were on and I had to give it alot of gas to get going.now the dash will work when I turn the key on but as soon as it starts it goes out with the exception of the oil pressure and the charging gauge. The transmission isnt working right at all and I dont dare drive it anywhere. The fuse box under the hood does not test right, only about half of it has power and I am at a loss there!