Chevrolet Repair: brake booster (vacuum leak), vacuum leak, vacuum hose

Question
Hi Tom,97chevy s10 has a vacuum leak when brake petal is employed.I have replaced the booster unit
And still it loses vacuum check seems operational.

Answer
HI DAVID, IF IAM READING THIS CORRECT WHEN YOU PRESS DOWN ON THE BRAKE PEDAL YOU HEAR A VACUUM LEAK ??? THIS ONLY HAPPENS WHEN YOU PRESS THE BRAKE PEDAL CORRECT ?? IF THIS IS CORRECT THE BOOSTER IS FAULTY. REPLACE IT AGAIN WITH A GOOD BOOSTER.. MAKE SURE THERE IS NO VACUUM UNDER THE DASH FOOLING YOU,SUCH AS A LEAK IN THE DEFROST SYSTEM OR BLEND DOORS...TO BE 100% SURE,,, REMOVE THE VACUUM HOSE AND PLUG IT TO THE BOOSTER, START THE ENG AND PRESS THE PEDAL,[WILL BE HARD TO PRESS]  IF VACUUM LEAK IS GONE. THE BOOSTER IS FAULTY.LET ME KNOW HOW THIS WORKS OUT FOR YOU..GOOD LUCK,,,TOM.

RVISED ANSWER:HI DAVID..THERE IS NO PROBLEM DRIVNG THE TRUCK LIKE THIS BUT YOU ARE GOING TO GET A SORE LEG FROM THE PRESSURE NEEDED TO STOP AND IF YOU REALLY NEEDED TO BRAKE FAST IT WILL NOT HAPPEN..SO BE CAREFULL !!!!GOOD LUCK TOM...