icon 2020+ GMC Sierra 2500/3500HD Single 40in Light Bar | M&R Automotive
WhiteAmberdual function: White light with Amber DRL backglow
  • Product Description
  • Light Bar Specs
  • Shipping & Warranty
  • Fits 2020 2021 2022 2023 2024 GMC Sierra 2500/3500 HD
  • Trims: PRO, SLE, SLT, AT4 


  • The mounting bracket is on a rail system (see photo). This allows you to move the light bar up or down of about 6in. You choose where you want the light bar to shine through the grille. 
  • No cutting or drilling required. The kit is a complete bolt on using factory openings and hardware.
  • WILL NOT interfere with active grille shutters. Our light bars are very slim and the metal bracket is designed to be in front of the shutters. 
  • Metal bracket is powder coated black


👌M&R promises fitment of the light bar with the grille as pictured. If you have a different type of grille, please reach out with pictures for confirmation.

👍Our light kits are for off-road use only.

Choose your light bar color:

1) White LED -- Up to 15,000 lumens, bright and powerful. It will definitely provide you with enough light needed for all of your adventures. However, these are only for off-roading and can’t be used on the regular road. They will blind the in-coming traffic and also violates road safety.

2) Amber LED -- Up to 7,000 lumens, used in poor driving conditions such as dust, fog, snow and rain. It reflects through air particles much less than the white light. Therefore, making it ideal for poor driving conditions. For off road use only. 

3) dual function: main White LED light with Amber DRL backglow -- the white LED light is same as described above, but the amber DRL “daytime running lights” acts purely for aesthetics. Since it doesn’t give out much light, you can use this amber DRL feature on regular roads, it doesn't blind in-coming traffic. 


Full in-depth video describing our lights bars CLICK HERE


(1) 40in light bar

(2) mounting brackets

All mounting hardware


  • M&R Automotive doesn’t provide a wiring harness. 
  • The light bar has 6ft of wire which is enough to reach AUX wires if your truck has them. If not, you need to purchase a generic wiring harness from Amazon/Ebay or create your own.

  • We now sell Wireless 8 Circuit Wiring Harness. This makes install much easier, no need to run any wires through the firewall, clean install.


All domestic (USA) orders are free shipping via USPS or UPS, depending on product size.
We typically ship in 3-7 business days. If we are anticipating a delay with your shipment due to availability of the product, we will reach out to you via email.

Canada, international or express shipping costs are calculated at checkout. 

You will receive an email with tracking number when your order is shipped. 

If you have a special request about your order, reach out, we try to accommodate as much as we can. 

For a complete shipping policy click here.  

We have a lifetime warranty on our light kits. We truly want our truck enthusiastic customers to enjoy their products as much as we enjoy designing them. However, we also understand that different situations arise with brackets or lights. For more information about our warranty and disclaimer click here. 

*M&R Automotive is not responsible for misuse or improper installation of the product. Professional installation is recommended. 

Revolutionize the way you connect and power accessories in your vehicle with our wireless wiring harness. Designed to enhance convenience, safety, and efficiency. Take the hassle out of traditional installations, providing a seamless and clutter-free solution for your  accessories.


In the past, you'd have to run a wire through the firewall inside the vehicle, no more! With this super easy installation, you can connect up to 8 different accessories (doesn't have to be lights), wirelessly! 


Wireless Connectivity: With advanced wireless technology, connect and power various accessories without the need for traditional wiring. Enjoy a cleaner and more organized interior.  Wireless remote stays inside your vehicle without the need to run a wire through the firewall.


8 Switches: Total of 8 circuits: (2) 5amps, (2) 10amps, (2) 20amps, (2) 30amps

  • Max power: 1200watts
  • Max current Rating: 80amps
  • Voltage: DC 12V-24V

Plug-and-Play Compatibility: Installing accessories has never been easier. Designed with a user-friendly, plug-and-play interface, eliminating the need for complex wiring setups. Simply connect your accessories to the panel and you're ready for an adventure. 


Universal Compatibility: Whether you're adding LED lights, off-road equipment, or other accessories, our wireless wiring harness is universally compatible. Seamlessly integrates with your vehicle's electrical system.


Enhanced Safety: Reduce the risk of electrical issues and potential hazards associated with traditional wiring systems. Engineered with safety in mind, featuring built-in safeguards to protect against overloads, short circuits, and other electrical mishaps. 


Weatherproof Design: Built to withstand the toughest conditions, it is fully weatherproof. It has a rubber gasket around the fuse box and covered in epoxy. 


Customer Reviews

Based on 5 reviews
This harness makes auxiliary lighting projects super easy

Let me start off by saying that this review is not only review of the product but also Mike’s customer service and punctuation.
Wireless Harness is very easy to install especially if you have enough real estate in the engine bay for the box. I installed mine right on top of the fuse box because it was most suitable spot in my engine bay. Wiring is super straight forward. Simple wiring instructions are included. Plus there are many videos right on the M&R website to check out installation steps and familiarize yourself. I had an issue at first not having any power to the auxiliary lights BUT that was purely user error. I did not pair the remote control properly with the wireless harness. I called Mike and walked him through the issue. He immediately knew what I did wrong and walked me through step by step to resolve it. Before you know it the project was done. I strongly recommend this product for these main reasons; you don’t want to drill through the firewall to run wires, and you would like to run multiple auxiliary lights and accessories on your vehicle.
Thank you Mike for great customer service and help!


Works great! Didn't care for the "universal mounting brackets". I found a company in Canada that makes a great engine compartment mount for the auxbeam which is the same dimensions. The wireless remote is the perfect size and has worked flawlessly. Using this on a 2022 ram 1500.


So far it is a very nice product and great addition to my new 4th gen taco


great quality, easy installation

Happy to hear it made the wiring job much quicker

2021 CHEVY COLORADO 40" Lightbar w/Wireless Wiring Harness

Purchased the M&R Wireless Wiring Harness to go with my M&R Single 40" Dual Function Light Bar w/amber DRL back glow LEDs. Decided to take this project on after watching the YouTube Video. I initially purchased the generic wiring harness recommended in the M&R video from Amazon, but then discovered the wireless harness before I started the installation. I returned the generic Amazon harness and purchased the M&R wireless harness. Set back my installation by a couple of weeks. Disassembly of my Colorado front end was relatively straight-forward, but took me much longer to reassemble than I expected to get everything back to perfect. The 'wireless wiring harness' was a very simple installation and the information provided (video/written) was perfect. That portion of the installation was probably accomplished in 20 minutes, once I decided how I would mount the harness box. Not having to breach the firewall of the truck was a plus I really liked and my BulletPoint Mounting system that I use for my phones was very adaptable to mounting the wireless controller in a central location. Overall, I'm very pleased with the quality of both M&R products I purchased and their warranty was better to similar light bars or bull bumpers I was considering. I'm sure I will be using the expandability of the harness for ditch lights and bed lighting. AAA+++

I really appreciate this detailed review. I'm glad we were able to bring up your confidence to be able to do the install yourself through our YouTube videos. Those videos are long and tidious to make, plus the editing takes a while, so I really appreciate that you watched and learned. Totally agree with the Wireless harness, it really cuts down the install time. Trucks looks nice.

M&R Automotive

M&R Automotive