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

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

Key Features:

- Hand Crafted in-house by our award winning team
- Provides the factory subwoofer signal to feed into a new aftermarket subwoofer amplifier
- Connects at the factory BOSE amplifier for a zero splice connection
- Made from premium copper wiring along with audiophile grade RCA tips
- Available in multiple configurations depending on the amplifier being used (Contact us if unsure)

Choose Harness Type *

Subwoofer Only

Choose Your T-Harness Ends *

Speaker Wire

RCA Tips

With LOC

From $88.00 to $185.00

Quantity must be 1 or more

SKU: GMCTHarness-Wire

T Harness/ RCA ‘19 GMC Sierra w/ Bose

A must have if you’re wanting to add and amp to the Bose system. Makes install so much easier no taping into speaker wire. Sounds Good Stereo were very knowledgeable and shipping was fast and easy ABSOLUTELY would use them again for my next build. 💯 recommend!

Quality Products and Support

Purchased aftermarket electronics from a different company after running into it many obstacles I happen to find sounds good stereo on the web and the product I was looking for to connect my factory stereo to the aftermarket products. I still had many questions and the sounds good stereo team answered every single one and walked me through step-by-step how to connect and dial in all the settings. Keep in mind I did not get this service from the company that I purchased the majority aftermarket stereo parts. Sounds good stereo will be my go to in the future. Thank you for having knowledgeable, supportive, and patient team members to help customers like me.

Easy plug and play

This is very easy to install. Plug and play no need to cut wires. Very pleased with the purchase. Definitely recommend!

Perfect fit

Ordered for my 24 AT4 with Bose. Fit perfectly and works perfectly. Was able to use with the GM kicker setup. Very happy. Brought the bass level up just that little bit to compete the package.

Perfect fit

Easy install, no cuts. Thank you

PLUG AND PLAY WORKED GREAT

THE LOC WAS NOT FOCAL BUT STILL WORKED AND EASY PLUG AND PLAY WITH REMOTE WIRE

Exactly what I needed for my 2022.5 gmc sierra with the Bose. Great customer service!!

Exactly what I needed for my 2022.5 gmc sierra with the Bose. Great customer service!!

Chevy 2500 subwoofer upgrade.

The quality and ease of installation with this product was amazing. Don’t fall for cheap imitations this setup was perfect and made adding an additional subwoofer easier than ever expected.

2025 Silverado 1500 RST Crew Cab with Bose

Excellent after market Custom T Harness with LOC makes adding Skar amp and Skar ported box with 12 inch subs a breeze to the Bose system. Sounds so much better than only the small stock sub buried inside the center console which had no dedicated amp gain controls. Extremely fast shipping of the harness, received it the next day after it was shipped.

Plug and play

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

Product Description
Fitment Guide
Customer Reviews

Product Description

For the Speaker Wire and RCA options, you will need to see if your amplifier accepts speaker-level/high-level inputs and how. For example, here are several popular amplifiers and if they accept High-Level inputs:

Arc Audio High-Level = RCA
Mosconi High Level = RCA
Kicker = High Level = RCA
New Alpine High Level = RCA
Older Alpine High Level = Speaker Wire
JL Audio High-Level = RCA
Audiocontrol High-Level = Speaker Wire
New Rockford High-Level = RCA
Old Rockford High-Level = Speaker Wire

Skar Audio RP Series High-Level = Does not have it, you cannot use direct RCAs from your factory Bose amplifier. You must convert this with our LOC option.

Sundown Salt Series High-Level = Does not have it, you cannot use direct RCAs from your factory Bose amplifier. You must convert this with our LOC option.

DD Audio M Series High-Level = Does not have it, you cannot use direct RCAs from your factory Bose amplifier. You must convert this with our LOC option.

Rockville = High-Level = Does not have it, you cannot use direct RCAs from your factory Bose amplifier. You must convert this with our LOC option.

etc. Check the manual of your amplifier or call them to find out if your amplifier requires a external LOC.

Any questions, please let us know and we can guide you in the right direction.

Fitment Guide

Customer Reviews

T Harness/ RCA ‘19 GMC Sierra w/ Bose

Quality Products and Support

Easy plug and play

This is very easy to install. Plug and play no need to cut wires. Very pleased with the purchase. Definitely recommend!

Perfect fit

Ordered for my 24 AT4 with Bose. Fit perfectly and works perfectly. Was able to use with the GM kicker setup. Very happy. Brought the bass level up just that little bit to compete the package.

Perfect fit

Easy install, no cuts. Thank you

PLUG AND PLAY WORKED GREAT

THE LOC WAS NOT FOCAL BUT STILL WORKED AND EASY PLUG AND PLAY WITH REMOTE WIRE

Exactly what I needed for my 2022.5 gmc sierra with the Bose. Great customer service!!

Exactly what I needed for my 2022.5 gmc sierra with the Bose. Great customer service!!

Chevy 2500 subwoofer upgrade.

The quality and ease of installation with this product was amazing. Don’t fall for cheap imitations this setup was perfect and made adding an additional subwoofer easier than ever expected.

2025 Silverado 1500 RST Crew Cab with Bose

Plug and play

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

92%

(1170)

(48)

(17)

(10)

(31)

1136

2024 F150 block off plates

I picked up a set of custom door access block off plates from Sounds Good Stereo for my 2024 Ford F-150 and they exceeded expectations right from delivery.
Shipping was quick and reliable—arrived faster than anticipated with no delays. The packaging was professional and top-tier: everything double-boxed, with custom foam cutouts, bubble wrap, and secure wrapping so the plates showed up in perfect condition, zero scratches or bends. No worries about transit damage at all.
The plates themselves are extremely well made—cut from high-quality, thick HDPE plastic (feels sturdy and premium, not cheap ABS), precisely CNC-machined to fit perfectly without gaps, and finished smoothly. Installation was straightforward (used the alignment holes, added a bit of silicone for seal as recommended), and the difference in sound is immediate: tighter, punchier mid-bass from the doors, less cancellation from the factory holes, and overall cleaner response without swapping speakers. Paired with some sound deadening, it’s a game-changer for factory-ish setups wanting better performance.
Sounds Good Stereo nailed it on quality and service—great communication if needed, and these are a smart, affordable upgrade. Highly recommend for anyone chasing better door speaker output!

Kicker keyloc

Installed the kicker keyloc on my ‘25 Ranger Raptor B&O system. Thank you for a great and easy to install, tech support was very helpful. Thanks again system sounds clean and powerful, JL 500w amp , Rockford T1S2-10 sub loaded into a Skar under seat box.

Quality Sales and Support

I purchased the kit that included the LOC and it was such a simple plug and play device that was all made from high quality parts. I had an issue post install that ended up being completely unrelated to the equipment I purchased, however, a support specialist stayed on the phone with me working through some troubleshooting until it was figured out and fixed. Thanks for the support after the sale. Big PLUS in my book!

Simple and effective

Well, made easy to install. does a great job.

2022 Ford F150 B&O Unleashed - factory roll off fixed

Great product. I am so glad I purchased the factory harness with the pre-tuned Kicker Key LOC. I was having trouble tuning my sub addition due to the factory roll off and this solved all my issues.

Awesome product!

Awesome product. Makes it so you are able to keep everything nice and neat. There was some seat back trimming required, but not bad at all.

It works but wires are labeled wrong

I installed this in a 2019 GMC Sierra. I decided to test it out with a tone generator before wiring it to my line out converter and about half of the speaker wire leads were labeled wrong and I had to relabel them. Besides that it worked fine. Just had to spend an extra 20 or 30 minutes trying to figure out all the wiring on it would have made my job a lot easier if it was labeled right in the first place

Important: Don't rely on generic harness labels alone. Each GM vehicle has unique wiring configurations, even though this harness is compatible with hundreds of GM models.

We strongly recommend obtaining the factory wiring diagram specific to your exact vehicle year/make/model. The best resource is acdelcotds.com/subscriptions - their 3-day membership gives you access to official GM wiring diagrams, which will ensure proper installation of this DIY harness.

Having the correct diagram will help you identify the exact wire functions for your specific vehicle and avoid potential installation issues.
Thanks for bringing this up!

Underseat Amp Rack Works Great

I purchased this to secure my amplifier and line output converter underneath my seat and clean up (hide) the wiring. Works great!

Behind-the-Seat >>> Subwoofer Plug & Play System with Sound Treatment

Product was delivered as expected and packaged extremely well. Installation was not difficult but would have been much easier if there was a current video for a 2024 Ford F250 install as they are a little different than the video explains. Placed a call to Sounds Good and they answered the phone with a person and they answered my question over the phone and the rest of the install was a breeze. Quality of the material is very good and the sound is much better than the factory Sub. With the sound material and block off plates the truck sounds like it should and I am very pleased with the purchase. Highly recommend the product if you are looking for extra clean base without breaking the bank.

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

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Free Shipping

Financing Available

AUTHORIZED ONLINE RETAILER

IN-HOUSE TECH SUPPORT

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