| NHTSA Campaign Number: |
04V287000 |
| Vehicle/Equipment Make: |
CHEVROLET |
| Vehicle/Equipment Model: |
IMPALA |
| Model Year: |
2004 |
| Manufacturer Campaign Number: |
4049 |
| Manufacturer Component Description: |
SERVICE BRAKES, HYDRAULIC |
| Manufacturers Involved in Recall: |
GENERAL MOTORS CORP. |
| Manufacturered: |
20040301 - 20040430 |
| Type of Report: |
V (Vehicle, Equipment or Tire) |
| Potential Number of Units Affected: |
47991 |
| Date Owner Notified By Manufacturer: |
20040628 |
| Recall Initiated By: |
20040628 |
| Manufacturer Responsible For Recall: |
GENERAL MOTORS CORP. |
| Report Received Date: |
20040623 |
| Record Creation Date: |
20040623 |
| Regulation Part Number: |
|
| Federal Motor Vehicle Safety Standard Number: |
|
| Defect Summary: |
CERTAIN PASSENGER VEHICLES WERE PRODUCED WITH LOWER THAN SPECIFIED TORQUE ON BOTH FRONT BRAKE CALIPER TO STEERING KNUCKLE ATTACHMENT BOLTS. WITH IMPROPER TORQUE, THE CLAMP LOAD AT THE JOINT MAY NOT BE ADEQUATE TO PREVENT MOVEMENT BETWEEN THE CALIPER BRACKET AND KNUCKLE. |
| Consequence Summary: |
DEPENDING ON WHETHER ONE OR BOTH BOLTS BACKS OUT OR FRACTURES, THE RESULT CAN BE LOCKING OF THE AFFECTED WHEEL DURING BRAKING AND AN ABRUPT STEERING INPUT IN THE DIRECTION OF THE LOCKED WHEEL, REDUCED BRAKING AND NOISE FROM THE AFFECTED WHEEL, OR SEVERING OF A BRAKE HOSE, INCREASED BRAKE PEDAL TRAVEL, AND REDUCED STEERING CONTROL. REDUCED BRAKING OR STEERING CONTROL COULD CAUSE A CRASH. |
| Corrective Summary: |
DEALERS ARE TO TIGHTEN BOTH BOLTS TO THE SPECIFIED TORQUE. OWNER NOTIFICATION BEGAN ON JUNE 28, 2004. OWNERS SHOULD CONTACT CHEVROLET 1-800-630-2438 OR PONTIAC 1-800-620-7668. |
