1) Low brake fluid: Check the brake fluid level in the reservoir. If it is low, add brake fluid and check for leaks in the brake lines.
2) Air in the brake lines: If there is air in the brake lines, it can cause the brake pedal to go to the floor. This can be caused by a leak in the brake lines, or by a faulty brake master cylinder.
3) Faulty brake master cylinder: The brake master cylinder is responsible for generating the hydraulic pressure that is used to actuate the brakes. If the brake master cylinder is faulty, it can cause the brake pedal to go to the floor.
4) Faulty brake booster: The brake booster is a vacuum-operated device that assists the driver in applying the brakes. If the brake booster is faulty, it can cause the brake pedal to go to the floor.
If you are experiencing a brake pedal that goes to the floor in your 2001 Deville, it is important to have it diagnosed by a qualified mechanic as soon as possible. Driving with a faulty brake system is dangerous and could result in an accident.
