To ensure reliability, purchase GM part # 12638689 Tensioner Assembly, Drive Belt. It is sometimes referred to as GMC Timing Belt Tensioner, GMC Timing Chain Tensioner. 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 GMC Terrain models.
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