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GM Modify Door Harness for Plug and Play Tow Mirrors - Silverado & Sierra (2019-2021)

$ 59.95
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Ships Within 1-Business Day

Sold as a set (kit covers both sides). This wiring kit adds the missing wires to your GM door harness for upgrading from small mirrors to towing mirrors. This is required for 2019 2020 2021 Silverado and Sierra 1500 trucks upgrading to towing mirrors.

This kit adds the running lights, turn signals, and cargo lights features for the towing mirrors. This kit is all that is required for 2020+ Silverado or Sierra 1500 trucks originally equipped with bed illumination. 2019 trucks also need the RZY harness (reference below FAQ for more details).

Why spend $200+ on replacing your door harnesses when you can just add the missing wires for a fraction of the price? 

This harness can be used at a significant cost savings instead of installing GM OEM part numbers 84622369, 84622370, 84622376, 84622380, 84622371, 84622372

Fitment: 2019 2020 2021 Silverado Sierra 1500


    Customer Reviews
    4.8 Based on 4 Reviews
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    Patrick V.
    United States United States

    GREAT Awesome Product!

    It was awesome! Instructions could be intimidating but it's actually not if you follow the step by step instructional video in Youtube. I was hesitant at first to purchase their cables/jumpers but because of the cost to have it done by the dealer, I went ahead and purchased 2 products and they worked as described (saved me about $500). I'm very happy with my purchase and highly recommend Boost Auto Parts!

    Marty F.
    United States United States

    2021 tow mirror upgrade

    The harness worked awesome. Your service was top notch, the four times I talked to tech support were very helpful and courteous. GM said the mirrors would not function on my truck without an extra harness. The add on harness was worse than then original so with the OEM harness and the Boost harness add on all functions work. Thanks for your help,

    Paul C.
    United States United States

    2020 silverado 1500 tow mirror harness

    Great and easy to follow video. Mirrors work great, love them.

    Ronald G.
    United States United States

    Installation video was detailed but complicated


    Boost Auto Parts

    Hi Ronald, Thank you for your purchase. We strive for continuous improvement and are eager to take your feedback. We always have our Technical Support team standing by ready to assist M-F, 9am-5pm CST. Please don't hesitate to reach out! Thank you, -Boost Auto Team