To ensure reliability, purchase GM part # 12639421 Valve Assembly, Egr Cooler Bypass. It is sometimes referred to as GMC EGR Filter, GMC EGR Vacuum Solenoid, GMC EGR Valve. 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 Sierra models.
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