To ensure reliability, purchase GM part # 84253577 Valve Assembly, A/C Refrig High Press Serv. It is sometimes referred to as GMC HVAC Pressure Switch, GMC A/C System Valve Core. 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 Canyon, Sierra, Yukon models.
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