Chevrolet Repair: air in brakes after repair, chevy venture, power booster

Question
had brakes put in my chevy venture 2000  wont catch brakes and you can hear air when you press on brakes bleeded them and the brake goes all the way to the floor

Answer
HI HELEN, YOU ARE NOT HEARING AIR WHEN YOU PRESS ON THE BRAKE PEDAL,THIS IS A VACUUM IN THE POWER BOOSTER MOUNTED TO THE THE FIREWALL BY THE BRAKE PEDAL..THIS IS NORMAL. HOWEVER A BRAKE PEDAL GOING TO THE FLOOR IS NOT. IT WOULD BE NICE TO KNOW WHAT KIND OF BRAKE WORK YOU HAD DONE.
AT THIS POINT IT IS JUST A GUESS ??? HOW HAVE YOU TRIED TO BLEED THE BRAKE SYSTEM ??? ALSO TELL ME IF THIS CAR HAS ABS..ANTI-LOCK BRAKES ?? ONCE YOU GET BACK TO ME ON WHAT YOU HAVE DONE AND HOW YOU DID IT, I WILL BE ABLE TO HELP YOU FURTHER..TOM..