1989 CHEVROLET C1500 Service Brakes, Hydraulic Problems

WHEN BRAKES ARE APPLIED PEDAL WILL GO TO THE FLOOR. HAD BRAKES CHECKED, AND WORKED ON, BUT PROBLEM STILL EXISTS. *AK

THE ANTI LOCK BRAKE SYSTEM DEPLOYS WHEN TOWING A TRAILER AND BRAKING. THIS "MOVES A BLOCK" IN THE MASTER CYLINDER, ACCORDING TO A MECHANIC, WHICH THEN DISABLES THE FRONT BRAKES UNTIL A MECHANIC RESETS IT. I THE MEAN TIME, THE DRIVER IS UNAWARE OF THE EVENT, AND IS OPERATING THE VEHICLE WITH THE 1/2 OF THE BRAKES DISABLED, CAUSING UNEVEN AND INADEQUATE BRAKING, AND EXTREME WEAR ON THE REMAINING BRAKES. THE PROBLEM SEEMS TO BE WITH THE ANIT LOCK BRAKE DEVICE ON THE MASTER CYLINDER, AND THE ADDED WEIGHT OF A TRAILER WHEN BRAKING. (EVEN THOUGH THE TRUCK CAME WITH THE "TOWING PACKAGE" AND THE TRAILER IS EQUIPPED WITH ELECTRIC BRAKES). *AK

THE ANTI LOCK BRAKE SYSTEM DEPLOYS WHEN TOWING A TRAILER AND BRAKING. THIS "MOVES A BLOCK" IN THE MASTER CYLINDER, ACCORDING TO A MECHANIC, WHICH THEN DISABLES THE FRONT BRAKES UNTIL A MECHANIC RESETS IT. I THE MEAN TIME, THE DRIVER IS UNAWARE OF THE EVENT, AND IS OPERATING THE VEHICLE WITH THE 1/2 OF THE BRAKES DISABLED, CAUSING UNEVEN AND INADEQUATE BRAKING, AND EXTREME WEAR ON THE REMAINING BRAKES. THE PROBLEM SEEMS TO BE WITH THE ANIT LOCK BRAKE DEVICE ON THE MASTER CYLINDER, AND THE ADDED WEIGHT OF A TRAILER WHEN BRAKING. (EVEN THOUGH THE TRUCK CAME WITH THE "TOWING PACKAGE" AND THE TRAILER IS EQUIPPED WITH ELECTRIC BRAKES). *AK

STOPPING ON SLIPPERY SURFACE IS POOR! FRONT WHEELS LOCK UP AND REAR WHEELS FREE-WHEEL. DEALER SAYS SYSTEM OK.*AK

BS BRAKES FAILED. DEALER ALSO REPLACED MASTER CYLINDER/CALIPERS AND ROTORS/BRAKELINES AND DRUMS. *AK

BS BRAKES FAILED. DEALER ALSO REPLACED MASTER CYLINDER/CALIPERS AND ROTORS/BRAKELINES AND DRUMS. *AK

BS BRAKES FAILED. DEALER ALSO REPLACED MASTER CYLINDER/CALIPERS AND ROTORS/BRAKELINES AND DRUMS. *AK

BS BRAKES FAILED. DEALER ALSO REPLACED MASTER CYLINDER/CALIPERS AND ROTORS/BRAKELINES AND DRUMS. *AK

BS BRAKES FAILED. DEALER ALSO REPLACED MASTER CYLINDER/CALIPERS AND ROTORS/BRAKELINES AND DRUMS. *AK

BRAKE PEDAL GOES TO THE FLOOR WITH EXTENDED STOPPING DISTANCE. MASTER CYLINDER REPAIRED, HOWEVER PROBLEM STILL EXISTS.

FRONT BRAKES WORK, BUT REAR BRAKES HAVE PROBLEMS. OWNER HAD MASTER CYLINDER REPLACED, BUT THAT DID NOT CORRECT PROBLEM. OWNER HAS HYDRAULIC BRAKE SYSTEM AND IS CONCERNED FOR HIS SFETY. *AK

KELSEY/HAYES ABS FAILURE, ON ANY ROAD CONDITIONS IN AN EMERGENCY SITUATION, THE REAR BRAKES DO NOT FUNCTION, PREVENTING THE VEHICLE TO STOP IN TIME.. TAKEN TO GM DEALER TWICE, DEALER STATED THAT IT IS A NORMAL FUNCTION. *AK

ON NORMAL ROAD CONDITIONS WHEN APPLYING THE BRAKES THE PEDAL GOES ALL THE WAY TO THE FLOOR AND THERE IS A LOUD BANG AT THE SAME TIME. THE SYSTEM HAS ABS. *AK