To ensure reliability, purchase GM part # 12721405 GEAR ASM-CM/SHF. It is sometimes referred to as GM Cam Gear, GM Variable Timing Sprocket. 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 Silverado models. It fits GMC Sierra.
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