Boost Auto Parts offers a full range of replacement lower glass compatible with all OEM and aftermarket Silverado and Sierra tow mirrors.
If your glass was secured with a screw behind the glass then you will need the replacement mount (see video below for install). This does NOT apply to OEM mirrors, Boost Auto mirrors, and some other aftermarket competitors.
Please note this glass does not have defrost (nor do OEM mirrors). If you need defrost lower glass please click here.
Cross References to GM OEM numbers: 23444114 and 23444113
Link to installation video: https://youtu.be/tSoX0PSkCtk