# NHTSA Preliminary Evaluation PE01001
> **VACUUM BRAKE BOOSTER** · Opened 2001-01-08 · Closed 2001-05-22
## Investigation
- **Action number:** PE01001
- **Type:** Preliminary Evaluation
- **Open date:** 2001-01-08
- **Close date:** 2001-05-22
- **Manufacturer:** General Motors, LLC
- **Affected makes:** CHEVROLET
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1997, 1998, 1999, 2000
- **Affected (make, year) variants:** 4
## Summary

ALLEGED THAT THE VACUUM BRAKE BOOSTER CAN FAIL RESULTING IN LOSS OF BRAKE EFFECTIVENESS AND EXTENDED STOPPING DISTANCES.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE01001)
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