To ensure reliability, purchase GM part # 16161412 Prom Calibration Unit (1659Axms). It is sometimes referred to as GMC Engine Control Module. 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 G2500 models.
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