1990 Chevy Suburban Losing brake pressure

1990 CHEVROLET SUBURBAN
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CHRSHE
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Brakes problem
1990 Chevy Suburban V8 Four Wheel Drive Automatic

I've noticed in the past 2 or 3 days that I'm losing brake pressure when I hold the brakes, sitting at a stop light or in traffic.
I've checked the fluid level and it's fine.
I'm wondering if this would be a vaccuum leak or if my Master Cylendar is going the way of the Do-Do.
May 5, 2009 at 2:04 PM
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MERLIN2021
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If there are no leaks, it is most likly the master.
http://www.2carpros.com/how_to/brake_master_cylinder.htm
May 5, 2009 at 2:35 PM
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