why is the brake pedal hard on 1997 Chevrolet 1500 Pickup

when i push the pedal after first starting its hard and weven when its driving the pedal still remains hard

Asked by for the 1997 Chevrolet 1500 Pickup
VACUUM PROBLEM (INCLU. CHECK VALVE) TO BRK. BOOSTER OR DEFECTIVE BOOSTER.
3 answers
bad brake booster
agree with wetry