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ABS light due to master cylinder assembly failure on Pontiac Bonneville

Problem Description and Possible Solution

The ABS master cylinder assembly may fail internally causing the ABS light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 267,589 (267,589–267,589)
3 model years affected: 1990, 1991, 1995
4 people reported this problem
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My abs light is on and fluid is leaking where the booster and master cylinder connect