1993 GMC Sierra 1500 - brake pedal to floor

bjrake problems-you have brake when engine is off, turn on engine and pedal goes to floor

Did you try pushing really hard with both feet with the engine off to see if you could get the brake pedal to go to the floor?

Probably fluid leak or bad master cylinder. Check the level of the brake fluid and go from there.


Good advice above. If those don’t pan out, another idea, might be a problematic brake booster.

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