Service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module
- Component
- Service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module
- Manufacturer
- GENERAL MOTORS CORP.
- Vehicles affected
- 65,439
- Reported to NHTSA
- 2004-04-19
- Owners notified
- 2004-06-16
Defect description
SOME OF THESE PASSENGER VEHICLES HAVE AN ELECTRONIC CONTROL UNIT (ECU) THAT MAY CALCULATE A HIGHER THAN ACTUAL VEHICLE SPEED BECAUSE OF AN ERRATIC REAR-WHEEL SPEED SENSOR SIGNAL, AND CAUSE ABS ACTIVATION WHERE IT IS NOT NEEDED OR NEEDED ABS ACTIVATION TO BE EXTENDED DURING BRAKING AS THE VEHICLE SPEED DROPS TO ABOUT 3 MPH.
Safety risk
UNEXPECTED ABS ACTIVIATION COULD INCREASE STOPPING DISTANCE UP TO ABOUT 11 FEET DPENDING ON THE GRADE OF THE ROAD, INCREASING THE RISK OF A CRASH.
Manufacturer remedy
DEALERS WILL REPROGRAM THE ABS CONTROLLER. OWNER NOTIFICATION BEGAN ON JUNE 16, 2004. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438.