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Dual Function (Third Brake Light Bed Cargo & Reverse) Wiring Harness - 2019-2022 Silverado & Sierra

Regular price $ 22.95 Sale price
$ 17.21
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This will get the center high mount stop lamp (CHMSL) cargo lights on your Silverado or Sierra to work as both a cargo light and a reverse lamp. This will also enable your rear-facing tailgate cargo light (if equipped) to come on in reverse. The truck's cargo lights will also illuminate when you unlock the truck with the key fob at night as a courtesy lamp. The installation is very easy and takes less than 5 minutes while following our installation video.

Important Note: This harness will not activate your tow mirror cargo lights in reverse. If you'd like your tow mirror cargo lights to come on in reverse, you will need to purchase a supplemental cargo and reverse harness HERE.


Link to Install Application A (3:52): https://youtu.be/uXQqv4QkbBc

Application A applies to the following vehicles:

  • 2019-2021 Chevy Silverado 1500
  • 2019-2021 GMC Sierra 1500
  • 2020-2022 Chevy Silverado 2500/3500
  • 2020-2022 GMC Sierra 2500/3500
  • 2022 Chevy Silverado 1500 LD
  • 2022 GMC Sierra 1500 LTD

Link to Install Application B (3:29): https://youtu.be/YnniromfCkc

Application B applies to the following vehicles:

  • 2022 Chevy Silverado 1500 Refreshed
  • 2022 GMC Sierra 1500 Refreshed


Fitment - This product fits the following vehicles (Including T1 New Body Style and Duramax diesel):

2019 Chevy Silverado 1500

2020 Chevy Silverado 1500 / 2500HD / 3500HD

2021 Chevy Silverado 1500 / 2500HD / 3500HD

2022 Chevy Silverado 1500 LD (More Info: LD v.s. Refreshed)

2022 Chevy Silverado 1500 Refreshed (More Info: LD v.s. Refreshed)

2022 Chevy Silverado 2500HD / 3500HD

2019 GMC Sierra 1500

2020 GMC Sierra 1500 / 2500HD / 3500HD

2021 GMC Sierra 1500 / 2500HD / 3500HD

2022 GMC Sierra 1500 LTD (More Info: LTD v.s. Refreshed)

2022 GMC Sierra 1500 Refreshed (More Info: LD v.s. Refreshed)

2022 GMC Sierra 2500HD / 3500HD


    Customer Reviews
    5.0 Based on 23 Reviews
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    Damon R.
    United States United States


    It makes a difference in Dark areas. It’s a great investment. I recommend this for all trucks.

    Steven P.
    United States United States

    Awesome stuff!

    Easy to install and works great! Thanks for making such a simple easy upgrade for my Vehicle lighting.

    Greg H.
    United States United States

    Works Perfectly - ‘21 Silverado RST

    Super easy install using the provided instructions. Works just as described! This is my 2nd mod from Boost Auto. Both are awesome! Highly recommend.

    Ryan P.
    United States United States

    So easy a caveman can do it

    Hands down worth the money took me 10 minutes to do and works great definitely that fastest shipping I’ve seen got it in like 2 days

    Juan T.
    United States United States

    Easily installed

    Item was delivered fast and works great. Can't beat it for the price.