Defect Investigation Detail
CHEVROLET / C/K SERIES / 2000
| Components - Details | |
|---|---|
| NHTSA Action Number: EA01013 | Vehicale/Equipment Name: CHEVROLET |
| Vehicale/Equipment Model: C/K SERIES | Vehicale/Equipment Year: 2000 |
| Component Name: SERVICE BRAKES, HYDRAULIC | Manufacturer's Name: General Motors, LLC |
| Date Opened: May, 22 2001 | Date Closed: Dec, 15 2002 |
| Subject: VACUUM BRAKE BOOSTER FAILURE | Summary: Odi upgraded the preliminary evaluation to conduct a full technical analysis, including testing.the testing and analysis shows that a torn diaphragm is a slow progressive type of failure.the tear propagates in a slow methodical manner and braking performance is similar to an untorn unit until the tear exceeds 1/2 inch.odi's testing indicates that tears greater than 1/2 inch required increased pedal effort.however, as the length of the tear increased beyond 1/2 inch, a hissing sound could be heard emitting into the passenger compartment where the master cylinder plunger passed through the firewall. odi has determined that a safety-related defect trend has not been identified at this time and further use of agency resources does not appear to be warranted.the closing of this investigation does not constitute a finding that no safety-related defect exists.the agency reserves the right to take further action in the future if warranted by the circumstances.odi's complete technical analysis with test data is attached. |