Good advice but that doesn't seem like the sort of thing that would suddenly cause a problem. That seems more like something that would either work or not work right from the get-go.
-----Original Message----- Check the new master cylinder. The new replacements have a different depth hole for the push rod than the origingals. Change pushrod to right length if has deep hole. Push rod for somewhere in 70's Malibu's usually about right. Had this problem and all brake places around could not find. I found my original master cylinder and compared the two. That is how I found this problem. Might be something to look for. John
