To ensure reliability, purchase GM part # 20756891 Mirror Assembly, Outside Rear View *Service Primer. It is sometimes referred to as GMC Side View Mirrors. 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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