# NHTSA Engineering Analysis EA89015
> **BRAKE BACKING PLATES** · Opened 1989-02-23 · Closed 1990-01-09
## Investigation
- **Action number:** EA89015
- **Type:** Engineering Analysis
- **Open date:** 1989-02-23
- **Close date:** 1990-01-09
- **Manufacturer:** General Motors, LLC
- **Affected makes:** CHEVROLET; GMC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1988
- **Affected (make, year) variants:** 4
## Summary

SUMMARY:CONTRARY TO THE MANUFACTURERS OPINION, ANALYSIS OF THE OWNER,FIELD, AND WARRANTY DATA DID NOT CLEARLY INDICATE THAT THE ALLEGED DEFECTWAS AN INFANT MORTALITY PHENOMENON.===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=EA89015)
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