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

by in Frost, TX on November 01, 2012
3 answers
ANSWER by , November 02, 2012
VACUUM PROBLEM (INCLU. CHECK VALVE) TO BRK. BOOSTER OR DEFECTIVE BOOSTER.
ANSWER by , November 02, 2012
agree with wetry
ANSWER by , November 04, 2012
bad brake booster