Brake Hoses, Lines/piping, And Fittings problems of the 1998 GMC Sierra 1500

Applied break to start truck. Foot went to floor, very weak pedal. Checked brake fluid level, found front reservoir empty. Traced brake lines for leaks. Found portion of rear hard brake line between gas tank and rear axle rusted through at bend where brake line leaves frame rail and heads to connect to flexible line at rear differential. Entire area around leak, bottom of bed, frame rail, shock, spring, etc. Dripping with brake fluid. Replaced a previous section of rear brake linearound 125k miles prior to finding out this was a common problem with GMC / chevy trucks.

I was approaching a busy intersection at a normal speed. When I used the brake it instantly went to the floor. No brakes! I went through the intersection into an empty lot. Thank god no accident. The brake line rotted because gm routed cheap steel lines in areas where sand, salt and water collect. GMC refused to cover the repair and it cost me 500. 00.