To ensure reliability, purchase GM part # 19434073 GEAR KIT,DIFF SI & PINION. 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 Blazer, Silverado, Tahoe models. It fits GMC Sierra, Sonoma, Yukon.
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