To ensure reliability, purchase GM part # 12101856 Connector,Air Switch Valve(W/Leads) *Green. It is sometimes referred to as GMC Chassis Wiring Harness Connector, GMC Door Harness Connector, GMC Door Lock Switch Connector, GMC Forward Light Harness Connector. 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, Sonoma, Yukon models.
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