United States 04V190000
General Motors, LLC
The problem
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.
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.
What owners should do
DEALERS WILL REPROGRAM THE ABS CONTROLLER. OWNER NOTIFICATION BEGAN ON JUNE 16, 2004. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438.
Units 65439