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:

*** CUT RCA TIPS OFF IF YOU NEED SPEAKER WIRE CONNECTIONS ***
- 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

Product Description
Fitment Guide
Customer Reviews

Product Description

Custom-made T-harness for adding an aftermarket subwoofer amplifier to Bose-equipped 2019-2026 GMC Sierra and Chevrolet Silverado trucks. Plugs directly into the factory Bose amplifier — no wire cutting, no signal loss. Choose from speaker wire, RCA, or built-in LOC output based on your amplifier. Hand-built in Nashville, TN.

Fitment Guide

Customer Reviews

91%

(1367)

(57)

(19)

(12)

(40)

1254

to create the best sound as I can

Im not an audiophile but I want to create the best sound as possible and was told that these would help. I recieved the order in a timely fashion, and got to work on the project. Straight-foward install and made a noticeable difference in the sound from the doors.

Bought the Blackhole tiles to sound deaden

Bought the Blackhole tiles to sound deaden the doors on my new F150. Not only did they quiet the ride but the stereo sounds much better. Where i was hardly getting any volume out of the door speakers they now sound much improved. When paired with the block off plates Im now much more satisfied with the sound.

Amazingly simple!

The plug-in play harness with the preconfigured key-loc is wicked. Takes all the guesswork out of the calibration plus, NOT having to cut the factory wiring is worth every penny.

The kit was so easy to install and it makes the factory stereo sounds so good without the bass roll off.

Amazing quality on that harness!

Best LOC

I've tried Audio Control LC2i Pro, the Audio Control Epicenter Micro, and the built in high level inputs from JL RD500/1. I'm now using this product along with the RD500/1 amplifier and it has never sounded better. Glad to have purchased this!

Used the adapters to swap to JL Audio C6

Used the adapters to put JL Audio 6.5” C6 speakers in the kick panels of my 2026 Ford Bronco Base 2-door. The wire passage holes needed to be drilled out larger and passenger-side adapter needed slight clearance adjustment with a dremel to fit under a steel bracket under the dash. No big deal. Material is easy to drill through and grind. Otherwise, these adapters work perfect for swapping out the Bronco kick panel speakers.

Great product, fast shipping and good customer

Great product, fast shipping and good customer service. Highly recommend

Fitment was amazing

Fitment was amazing. Shipping was quick. We do car audio every day and this is a huge time saver for us!

C6 door blockers

They were really easy to install and look clean and work perfectly

Just buy them!

I ordered these along with the jl audio c1 kit for the front and rear. I only wanted to take the door panels off once so I went ahead and bought these block off plates..they essentially turn your door into an enclosed speaker box and gives you more bass. Also makes your doors feel more solid. Glad I purchased and installed these, I feel they bring out the best of the jl audio c1 kit!

Impressive upgrade!!

What a great kit!! I went with this kit for my 2026 F-150 XLT with the non amplified radio. I have usually upgraded previous vehicles with infinity or kicker speakers and they left a lot to be desired and had to add a sub to get the sound I wanted. I paired this kit with the block off plates and sound deading and have been blown away by the sound quality. Everything was straight forward to install and took me about 6 hours total to complete all 4 doors. Even without an amp the speakers sound great. Around volume 15-17 the stock speakers started distorting. These gave me a lot more volume and can turn it up to 22-24 and still sounds great! I might add a amp in the future, but going to enjoy it for awhile! Highly recommend and would purchase this kit again!

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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

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Free Shipping

Financing Available

AUTHORIZED ONLINE RETAILER

IN-HOUSE TECH SUPPORT

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