# NHTSA Engineering Analysis EA88036
> **REAR DISC BRAKES** · Opened 1988-07-22 · Closed 1991-08-30
## Investigation
- **Action number:** EA88036
- **Type:** Engineering Analysis
- **Open date:** 1988-07-22
- **Close date:** 1991-08-30
- **Manufacturer:** General Motors, LLC
- **Affected makes:** BUICK; CADILLAC; CHEVROLET; OLDSMOBILE; PONTIAC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1982, 1983, 1984, 1985, 1986, 1987, 1988
- **Affected (make, year) variants:** 42
## Summary

SUMMARY: CORROSION IN THE REAR BRAKE CALIPER PREVENTS AUTOMATIC ADJUSTMENT FOR PAD WEAR. THIS MAY EVENTUALLY CAUSE LOSS OF REAR SERVICE BRAKE AND PARKING BRAKE. GM HAS ADDED CORROSION PROTECTION AND CHANGED SPRING RATE TO CORRECT PROBLEM. SAME BASIC DESIGN USED ON ALL MODELS IDENTIFIED.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=EA88036)
---
*AI Analytics · CC0 1.0*