Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 16087029 Prom Calibration Unit. It is sometimes referred to as GMC Engine Control Module. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM GM parts are the best for restoring your vehicle to factory condition performance. This part fits specific GMC C2500, C3500, K1500 models.
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