To ensure reliability, purchase GM part # 25533639 Valve,Brake Master Cylinder Propn. It is sometimes referred to as Buick Brake Proportioning Valve. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Electra, Lesabre models.
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