leaking brake fluid on 1992 Cadillac Seville

leaking brake fluid from the proportion valve. is it very hard to replace

Asked by for the 1992 Cadillac Seville
Whenever your'e replacing a brake hydraulic component, you should use a line wrench to remove the brake lines, and be very, very careful when threading the brake line fittings so you don't cross thread them, doing so creates a big problem. Go slow, be careful and try to use a power bleeder when done to ensure there is no air in the lines.