Hello together, with my 92er Sierra 2,0 GT without ABS I had to replace the long brake line to the rear axle. After that I filled the whole system with new brake fluid and aired all 4 brakes well. Since then I’ve been in the brake pedal a few cm empty before the brakes show effect. At first I thought that there was still air in the system but after several vents nothing changed. A familiar of me then directly said that on the main brake cylinder a cuff has become leaking and that this can happen quite often after the refilling. Have you already had similar experiences? What would you suggest, new overtaking kit or other main brake cylinders from the scrap yard, costs there 25€. Greetings, Holger