Custom Made T-Harness for BOSE - Compatible with 2019-2025 GMC Sierra - Chevrolet Silverado Vehicles

Let me tell you, This place is awesome! I truly appreciate them. I was on a search to install my truck stereo, but with these new technical crap they put in our cars and trucks with all these electronics, its hard to find a good product, and also good support to know what you need so you don't get upsold on crap you don't need. I spent 6 months planning out my audio setup! I was going in between 3 different setups with amp. After talking to SGS about what I need or my plans they got me straight. Told me what I needed! I had a hard time believing, but I listened to them and glad I did. Wow! They saved me a lot of time and money just getting this harness with rca connections direct to the amp. I did not have to buy a LC2 or any other stuff. Just subs, amp , wire and the adapter! This place is awesome and plan to buy again from them again!

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

Great product. Integrated seamlessly in just a few minutes providing input signal to additional subwoofer amp. I would buy again. Shipping was quick.

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

Want to make your install easy and professional looking you need this. Easy plug and play

Ordered and took over a month to receive Finally got it and will not consistently send signal to amp. Waste of money

I would return this if I didn’t wait a month for its arrival. I opted for the LOC version (because Focal is a trusted brand) in order to simplify any installation. When it arrived it was some unknown brand. Buy the cheaper version and do it yourself.

Perfect! Just what I needed for my 21 Silverado Trail Boss. Will be upgrading the rest of the audio and SG will be my go to!

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.