Why should a driver be cautious about brake fade on a long downgrade when operating a fully loaded passenger vehicle?

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1. Passenger vehicles are immune to brake fade regardless of load
2. This concern applies only to vehicles without power steering
3. Fading brakes reduce stopping power exactly when a heavy, fully loaded vehicle needs it most
4. Brake fade only affects empty passenger vehicles, never loaded ones, since a heavier vehicle is assumed to generate less heat at the brake pads

Correct!

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