GM Modify Door Harness for Plug and Play Tow Mirrors - Silverado & Sierra (2019-2022)
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 2022 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?
- Link to installation video (without forward facing spot lights): https://youtu.be/gst51r3Aa5Y
- Link to installation video (with forward facing spot lights, with puddle lights): https://youtu.be/-g9xzdLTncI
- Link to installation video (with forward facing spot lights, without puddle lights): https://youtu.be/1-kmGSMHH_Y
This harness can be used at a significant cost savings instead of installing GM OEM part numbers 84622369, 84622370, 84622376, 84622380, 84622371, 84622372
Fitment - This product fits the following vehicles (Including T1 New Body Style):
2019 Chevy Silverado 1500
2020 Chevy Silverado 1500
2021 Chevy Silverado 1500
2022 Chevy Silverado 1500 LD (More Info: LD v.s. Refreshed)
2019 GMC Sierra 1500
2020 GMC Sierra 1500
2021 GMC Sierra 1500
2022 GMC Sierra 1500 LTD (More Info: LTD v.s. Refreshed)
Reviews
- Reviews
- Questions
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!

harness installation non refreshed silverado YEAR 2020
I did this without prior experience. Did the right door first. It was challenging. When I did the left door it was a little more clear, but still difficult. Biggest challenges are pin identification and re-installation of door jamb plug and weatherproof boot. For someone doing this one time, I think a clearer pin identification is imperative, possibly a measurement from the top of the jamb plug As far as door jamb plug installation goes, possibly a better view of just how the plug disengages/ engages would help. Maybe an exploded view Also the rubber bellows- How does it attach A fuller understanding of it would lessen the chance of damaging the upper plastic latch for the bellows that attaches to the door jamb. If I did this for a living I imagine it would go as easily as it does in the video. I did get the kit in and all my lights are working as they should. So in the final analysis, it's a great product. I appreciate the research that went into creating the harness. It's at a fair price. I would caution those who have pork chops for hands and large arms to find a nimble skinny dude to help with the install.

2021 silverado tow mirrors
FAST EASY INSTALL HARNESSES WE STRAIT FORWARD

Wire harness
I had some trouble but the response was superb and corrected fairly quickly

Not harness…3 wires ♂️
I think it’s a bit expensive for 6 little wires ♂️

Mirror harness2021 GMC Sierra
Easy installation everything work perfect