To ensure reliability, purchase GM part # 19179933 Seal Kit,Differential Drive Pinion Gear. It is sometimes referred to as GM Differential Seal. 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 CTS, SRX, STS models. It fits Pontiac Solstice. It also fits Saturn Sky.
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