To ensure reliability, purchase GM part # 12479321 Gear Kit,Front Differential Side & Pinion (Also Used On 4A1, X0412). 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 Brougham, Escalade, Fleetwood models. It fits Chevrolet Blazer, Silverado, Tahoe. It also fits GMC Sierra, Suburban, Yukon. This also fits Hummer H2.
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