ABS accumulater may fail on Buick Riviera

The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)

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Average mileage: 135,800 (90,000–190,000)
7 model years affected: 1990, 1991, 1992, 1993, more1995, 1996, 1998
10 people reported this problem
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Viewing 1 - 3 of 3 problem details
1998 Buick Riviera 95,000 mi,
At low speeds you press the brake and the pedal becomes very hard and comes up instead of going down had brakes repaired/replaced Did NOT Solve problem. Now have 146,000 miles with same existing problem. NEVER REPAIRED
ABS light on. Stopping power decressed at least 50%. Also has caused the cruse control to stop working.
1996 Buick Riviera 190,000 mi,
Hard pedal I replaced the booster