# NHTSA Engineering Analysis EA87008
> **REAR BRAKES** · Opened 1986-12-17 · Closed 1988-07-22
## Investigation
- **Action number:** EA87008
- **Type:** Engineering Analysis
- **Open date:** 1986-12-17
- **Close date:** 1988-07-22
- **Manufacturer:** General Motors, LLC
- **Affected makes:** PONTIAC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1984, 1985, 1986
- **Affected (make, year) variants:** 3
## Summary

SUMMARY OF INFORMATION FROM MANUFACTURER:GMREVIEWED THE MATTER AND...HAS NOT IDENTIFIED A SAFETY-RELATED BRAKE CONDITION THAT REQUIRESFIELD CORRECTION.ANALYSIS:IT APPEARS THAT THE PARKING BRAKE ACTUATION SYSTEM OR THEPISTONS WITHIN THE CALIPER CAN SEIZE PROHIBITING REAR DISC BRAKE FUNC-TION.A SEIZED CALIPERS CAN RESULT IN UNEVEN BRAKE OPERATION (PULL)AND/OR TOTAL LOSS OF THE EMERGENCY BRAKE FUNCTION.STATUS:TEST REQUEST AT ETF AND NEAR COMPLETION.AWAITING GM RESPONSE TO JUNE 17, 1988 INFORMATION REQUEST.===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=EA87008)
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