To ensure reliability, purchase GM part # 12633781 Pulley Assembly, Belt Idler. It is sometimes referred to as GM A/C Idler Pulley. 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 Trailblazer. It also fits GMC Envoy. This also fits Oldsmobile Bravada.
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