1998 Chevrolet B7

VEHICLE DESCRIPTION: SCHOOL BUSES, MEDIUM DUTY TRUCKS AND TRACTORS BUILT WITH BENDIX AIR ABS WITH AN EC-17 1030R ELECTRONIC CONTROL UNIT (ECU), THERE HAVE BEEN REPORTS OF UNWANTED ABS ACTIVATION AT LOW SPEEDS CAUSED BY 1) CHAFED ABS WHEEL SPEED SENSOR WIRES ON ROTATING PARTS OR 2) A DAMAGED COMPONENT AT THE WHEEL END THAT GENERATES A CERTAIN TYPE OF ERRATIC SENSOR SIGNAL.

RiskTHIS CONDITION COULD CAUSE THE ABS ECU TO EXHAUST THE AIR AT THE AIR BRAKE MODULATORS FOR ONE OR MORE OF THE WHEELS. THIS COULD RESULT IN EXTENDED BRAKING DISTANCES AND A POSSIBLE CRASH.

FixDEALERS WILL REPLACE THE ABS ECU.

VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH POWER STEERING. SOME OF THESE VEHICLES WERE ASSEMBLED WITH AN INCORRECT INTERMEDIATE STEERING SHAFT. THE OVERLAP IN THE SLIP JOINT IS INSUFFICIENT ALLOWING THE STEERING SHAFT TO SEPARATE.

RiskTHIS COULD LEAD TO LOSS OF STEERING, INCREASING THE RISK OF A VEHICLE CRASH.

FixDEALERS WILL INSPECT THE STEERING SHAFT AND, IF NECESSARY, REPLACE THE INTERMEDIATE STEERING SHAFT.

VEHICLE DESCRIPTION: MEDIUM DUTY TRUCKS EQUIPPED WITH AIR BRAKES AND ANTI-LOCK BRAKE SYSTEMS. CHAFFING OF THE ELECTRIC BRAKE CONTROL HARNESS CAN OCCUR RESULTING IN AN ELECTRICAL GROUNDING CONDITION. THIS WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL AND SHUT OFF THE ABS FEATURE.

RiskTHIS CONDITION CAN CAUSE REDUCED BRAKING CAPABILITY OF THE FRONT BRAKES, INCREASING THE RISK OF A CRASH.

FixDEALERS WILL INSPECT THE HARNESS FOR CHAFFING AND PROPER ROUTING AND WILL REPAIR IF NECESSARY.