2008 CHEVROLET EXPRESS 1500 Traction Control System Problems

PURCHASED A NEW 2008 CHEVY EXPRESS 1500 WITHIN 9 MOS HAD ABS AND STABILITY TRACTION LIGHT ON. TECH REPLACED WHEEL SENSOR. HAPPENED AGAIN 6 MOS LATER, 4/7/09 AND 5/15/10. ON MY LAST VISIT THEY SAID THEY FOUND A SHORT, BUT THE LIGHTS ARE ON AGAIN 2 WEEKS LATER. THE SAFETY ISSUE IS WHEN THE ABS AND STABILITY TRACTION LIGHT IS ON (AND ONLY WHEN TRAVELING BELOW 30 MPH) WHEN APPLYING BRAKES, THE ABS AUTOMATICALLY WILL ALLOW THE BRAKE PEDAL TO GO DOWN ALMOST TO THE FLOOR. THIS IN TURN ALLOWS THE VEHICLE TO TRAVEL ADDITIONAL DISTANCE WHEN TRYING TO STOP. THIS HAPPENS ON PERFECTLY LEVEL, SMOOTH AND DRY CIRCUMSTANCES. ONE OF THE MECHANICS AT THE DEALER'S SERVICE DEPARTMENT STATED TO ME THAT THIS PROBLEM EXISTS IN MANY CHEVY VANS UP TO AND INCLUDING 2010. OBVIOUSLY THEY HAVE NO CLUE AS TO WHAT IS CAUSING THIS MALFUNCTION. SOME OTHER MECHANICS HAVE...