Custom Made T-Harness for BOSE - Compatible with 2019-2026 GMC Sierra - Chevrolet Silverado Vehicles

These harnesses are easy to use and work just as described. . There noise issues or Anc worry about or worrying bout getting a full range signal. Fast shipping great products. A little bit pricey bit you get what you pay for. Metra or PAC didn't even offer a hsrness to add an bass amp to the B & O SYSTEM or to the Bose systems in late model GM trucks.

I have a 2025 GMC sierra and a stereo insulation company quoted me $1000 to hook up my amp and my subwoofers that I already own to the system that’s stuck in my truck with a Bose sound system. It already sounds really really good..

But I wanted to add more base without paying $1000 and I couldn’t believe I found this amazing company that custom made me the wiring harness that I need to just hook up my amp directly to the Bose system plug-in play… I just really wanna think this company for making this product and saving me $800. I did it all myself and it sounds absolutely amazing it’s made with great quality audio equipment. I just can’t say enough about this company for making this custom product for me all of you out. There should absolutely give this a shot. You won’t be disappointed.. Thank all of you who work there .

Kit had everything needed to tie into my 2024 Denali 3500. Was really easy and even have the remote wire.

This harness is gold. Makes sub install in a bose equipped truck a breeze. This is my 2nd harness I've purchased to install a mild set up in my truck.

Sounds great and easy to install. Too easy. Yes I could tap into the Bose wire but this saved me an hr and the quality of the RCA is great.
Tech support was super quick in responding to my question of fitment

A perfect plug and play fit to my 2025 GMC SIERRA 1500 DENALI.

The harness is made of good quality and wrapped in factory like tape. The connectors do not click but do secure into the amp and harness. There is no instruction manual or diagram or what wires are for what so you’ll have to reach out to support. The wires do not matter as there is no left or right channel but the black stripe wire is negative which does matter. Just a small diagram printout included in the package would save a lot of questions and headaches.

This component is plug-n-play, simple to install, and I am impressed by the output signal level and clarity. It is a must have for those who want to retain the factory BOSE amplifier while adding an aftermarket amplifier and subwoofers.

This Harness made installing a sub/amp in my truck a breeze! Honestly the hardest part was removing the seat to access the bose amp. Other than that,super simple process! I used a Kicker Key500.1 amp,so didn't have to run a remote wire. Thanks for all the Help,Don!!!!

I purchased a speaker wire version which was easy to install and worked as intended. High quality construction. I called in for some tech support and they gave me great help in troubleshooting my PAC TR7. Highly recommend these guys!! Thanks

I purchased this t-harness with the hi-level input speaker wire option and paired it with an Audio Control LC-1.800. Harness was well constructed and worked as intended. Easy installation and easily removable if the vehicle is sold.

After waiting 3 months with another harness manufacturer & being fed BS excuses i decided to cancel & look for other options. Wish i would have found SGS sooner & i could have had my system installed 3 months sooner. Good quality harness all plug &play. Ordered speaker level output and used an alpine MvR-500 didnt even need the remote wire. SGS will be my go to for sound eq from now on

I used this on my 2016 gmc Yukon XL I used the speaker 4 pin high level and the harnesses worked well with the factory amp (BOSE System) the only down side is that the remote wire didn’t work and I was troubleshooting for a whole day then I jumped my remote wire to the 12v+ on the amp then I realized it was the remote wire so ran my remote wire to the front near the front driver side door there is a fuse box right there. The YouTube video is linked below to the remote wire installation I used a bussmann atr fuse tap and a 10 amp atr fuse to the factory.

https://youtu.be/G0yViIqtShA

https://www.autozone.com/electrical-and-lighting/fuse-and-accessories/p/bussmann-circuit-fuse-tap/547344_0_0

https://www.autozone.com/electrical-and-lighting/fuse-and-accessories/p/bussmann-10-amp-atr-micro-ii-blade-fuse-5-piece/547339_0_0

Product was as described! Build quality was great and shipped in a timely fashion. I got it in roughly a week during the holiday break. Initially I did not think the fitment was correct. The harness would not fit the oem connectors. Eventually I removed the red piece in the picture and was able to force the harnesses together before reattaching the red connector. This harness allowed me to add a mono amp me to the existing oem system. It provided me with a remote turn on and rca outs to my lineoutput converter (loc might not be necessary if your amp can receive 6v rca inputs?) No cutting/splicing was required, and it is easily reversible without any signs of tampering if you need to uninstall it.

I'm running this harness in my 2022 GMC Sierra AT4. It really was the easiest part of my install. This is a true plug and play adapter that gives you a simplified solution to mount your sub amp. The remote turn on wire is a huge benefit and made the job that much easier, and wiring that much cleaner. I'm still not sure if it bypasses the Active Noise Cancellation though, but so far, I have no complaints. The customer service has been great too. They called me after placing my order to verify how long I needed the RCAs to be. I've never had a company do that. I'm a returning customer for sure. Highly recommend!

Great quality, fast shipping. Overall saved me so much time on my install.

Works like a charm! Easy to install and well worth the money.

Works exactly as listed. I got the one with rca's. For any that didnt read, these are low level signals and will Not turn on the signal sensing on some amps.
Very easy to install, only took me about 30 minutes from start to finish with basic tools. (there are videos of how to get to the amp on YT)