# NHTSA C9 C90001
> **REAR DISC BRAKES** · Opened 1990-02-21 · Closed 1991-07-31
## Investigation
- **Action number:** C90001
- **Type:** C9
- **Open date:** 1990-02-21
- **Close date:** 1991-07-31
- **Manufacturer:** General Motors, LLC
- **Affected makes:** CHEVROLET; PONTIAC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1982, 1983, 1984, 1985, 1986
- **Affected (make, year) variants:** 13
## Summary

There is no summary currently available

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=C90001)
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