GM Tow Mirror Signal on Glass Upgrade Kit (2019+ Style)

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Sale price $ 99.95

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Original Mirror Configuration
Select your mirror's original configuration. Our glass is NOT equipped with Auto-Dim, you will lose that feature if originally equipped.
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This kit adds an integrated red turn signal on glass to your upper mirror glass for added safety and visibility. Easily installs in minutes onto your OEM towing mirrors, with a fully plug and play wiring adapter. Replacement glass is offered with or without blind spot monitoring. Must purchase the glass according to your original mirror configuration. 

 **Our glass does NOT come equipped with Auto-Dim, you will lose this feature if you currently have it. We ask whether you originally had it because it dictates other fitment on the glass assembly**

Fitment includes 2019-2024 Chevy Silverado or GMC Sierra 1500, or 2020-2024 Sierra or Silverado 2500 and 3500 trucks. This product fits a variety of trucks including L5P Duramax models. Please see below the fitment list. (Replacement upgrade for GM OEM numbers: 84753945, 84753944, 84301410, 84301411, 84819559, & 84819560)

Vehicle fitment Fitment note


Yes. A fully plug-and-play wiring adapter is included with your purchase along with an installation video to show you how to install the kit.

There will be a line around the border of the entire glass if you have Auto-Dim. See the below graphic for comparison.

If you are unsure, please email us a picture of your glass or your VIN and our team can check.

No, you must order the glass the way your mirrors were originally equipped. It is NOT possible to add blind spot monitoring.

Yes, all of the glass we offer comes integrated with a defrosting element.

The only feature we do not offer is the Auto-Dim. If you have this you will lose it.

We ask whether you had auto-dim originally because it affects other fitment on the glass. Our glass will NOT come with Auto-Dim, regardless of how you purchase it.

The signal on glass when illuminated is red.

Email your VIN to and our team can check for you.

Yes, we also offer the lower glass at the below link.

Link to lower glass:

2019+ Silverado and Sierra 1500 with OEM towing mirrors

2020+ Silverado and Sierra 2500/3500 with OEM towing mirrors

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Customer Reviews
4.2 Based on 9 Reviews
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United States United States

Great add

I ended up doing everything I could upgrade to my mirrors, lights, turn signal, heater, and I love how all of it came out. Great quality easy to install. Just don't make my mistake and make sure if you have auto dim mirrors that you choose the right option, they are not the same (all my fault). Like everything else I have from BA I love everything and haven't had any problems. All high quality. Would recommend to anyone. the video instructions are the best btw, so if you are not the best mechanically, you can do the install yourself.

Micah M.
United States United States

Fast shipping good quality

Easy install. Secure packaging

Chris M.
United States United States

Tow Mirror signal

Awesome! Installed them Yesterday and absolutely love them. The installation and video wasnt bad at all!

Boost Auto Parts GM Tow Mirror Signal on Glass Upgrade Kit (2019+ Style) Review
Dallas G.
United States United States

Updated glass

It was great but anyone with a 20+ needs to modify the rear of the mirror to get full adjustment There are small brackets on the back to hold an additional wiring and those need snapped off to allow full adjustment of the glass for the drivers side

Houston H.
United States United States

GM Tow Mirror Signal on Glass Upgrade Kit

Excellent glass quality, very easy installation. However if you are buying the Auto Dim make sure your vehicle has the Auto Dim feature.

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