To ensure reliability, purchase GM part # 12478093 Seal,Transfer Case Rear Output Shaft. It is sometimes referred to as GMC Transfer Case 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 GMC Sierra, Yukon models.
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