To ensure reliability, purchase GM part # 18040239 PISTON, Brake Master Cylinder Secondary. 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 Silverado, Suburban models. It fits GMC Sierra, Yukon.
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