Electrical Failure Problems of Cadillac STS

I have a 2007 Cadillac Sts - top of the line car. At 800 miles, I had to have a new engine put in the car and now at 4,000 miles, the electrical systems fail, with out any warning. The car's electrical system totally shuts down, the hydraulic sytems fails and the engine is obviously off. There was no indication of any failure or any warning, the car's electrical system simply shuts off - completely. Emergency flashers do not work, there is no access to the trunk for safety material. Therefore, if this occurs on a highway at a reasonable speed, there clearly will be an accident - potential fatal accident by a car simply shutting down, with no indication of same.

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The contact owns a 2007 Cadillac Sts. The contact stated that the accelerator pedal and the brake pedal are too close together. The accelerator pedal was inadvertently depressed instead of the brake pedal, causing the vehicle to crash into a tree. The crash occurred while driving 25 mph. The air bags failed to deploy. A police report was filed. The front end was damaged and has been repaired. The manufacturer stated that they are unable to be of assistance. The vehicle failed to start on two occasions and was towed and repaired both times. The repair or replacement part was unknown. The contact stated that the cause of failure was electrical. The purchase date was unknown. The current mileage is 3,600 and failure mileage was 300.