I had the same problem on a 2000 Blazer. If you don't replace the booster now, you'll be replacing it soon enough.

__________________
1987 300SDL 167k
1992 Volvo 740 140k
1990 Volvo 740 250k
1989 Volvo 240 269k

Anyone want to trade an old Volvo for an '87 300sdl?