To ensure reliability, purchase GM part # 22781131 GENERATOR Assembly. It is sometimes referred to as GM Alternator. 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 Buick Rainier models. It fits Chevrolet Express, Silverado, Trailblazer. It also fits GMC Savana, Sierra, Yukon. This also fits Hummer H3, H3T.
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