To ensure reliability, purchase GM part # 6421972 Valve,Crankcase Vent. It is sometimes referred to as Cadillac PCV 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 Cadillac Commercial Chassis models.
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