Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Was there any damage to brake lines? Some time the proportioning valve will stick one way or either. If you have pressure at front you can try opening bleeder on front and slamming brake pedal down. Sometimes this will free up the proportioning valve. If this doesn't do it. are you getting pressure from master cylinder? It is time to start testing where the fluid stops. Start at front and work back. If you have pressure from master cylinder loosen line behind proportioning valve.