Antilock: control unit/moduleRecall 78V-098 · 1977–1978 GMC DF9500
GENERAL MOTORS CORP. recall 78V-098 covers 59 1977–1978 GMC DF9500 for a antilock: control unit/module problem, reported to NHTSA on May 3, 1978.
Source: NHTSA recall 78V098000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
THESE VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS". THESE VEHICLES WERE BUILT WITH AN INCORRECT RESISTOR BOARD IN THE EATON CONTROLLER ON THE WHEEL LOCK CONTROL VALVE.
The fix
DEALER WILL REMOVE THE INCORRECT RESISTOR BOARD AND INSTALL THE CORRECT ONE, WITHOUT CHARGE TO OWNER.
VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH EATON ANTI-LOCK SYSTEMS.SYSTEM: SERVICE BRAKES; ANTI-LOCK SYSTEMS.CONSEQUENCES OF DEFECT: THIS INCORRECT RESISTOR BOARD COULD CAUSE THE WHEELLOCK CONTROL SYSTEM TO BECOME INOPERATIVE AT SPEEDS OVER 35 MPH. IN THE EVENTWHEEL LOCK-UP DOES OCCUR, LOSS OF VEHICLE CONTROL AND AN ACCIDENT COULD RESULT.NOTE: THIS CONDITION WOULD BE SIGNALED TO THE DRIVER BY ILLUMINATION OF THEYELLOW WHEEL LOCK CONTROL LIGHT.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.