To ensure reliability, purchase GM part # 12590963 Pulley,Belt Idler(W/Bracket). 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 Colorado models. It fits GMC Canyon. It also fits Hummer H3, H3T.
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