Are they coming on without touching the pedal at all, or just not releasing after they've been used?
If they're coming on without touching the pedal at all, I'd suspect a bad vacuum booster.
If they're not releasing after they've been used, I'd suspect a bad brake hose that's swollen shut.
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Derek Kiefer, member of Minnesota's Northstar Chevelle Club
69 Malibu Pro-Touring - 69 SS396 3spd - 23 Model T roadster pickup
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