Need help I have replaced the brake booster and the master cylinder to my truck and bleed brakes and brakes still goes to floor need ideas please help
Without knowing what year this truck is, first guess is your rear drum brakes are out of adjustment.
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Is the truck leaking fluid?
Did you bench bleed the master before installing?
Did you open the master’s lines once installed to purge the air bubbles at the master out?
Does it have ABS? did you cycle the ABS valves to purge the air out?