To ensure reliability, purchase GM part # 15978090 VALVE ASM. It is sometimes referred to as GM 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 Chevrolet P30 models.
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