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


From $80.00 to $185.00




GMCTHarness-Wire

Customer Reviews

Based on 52 reviews
88%
(46)
4%
(2)
2%
(1)
0%
(0)
6%
(3)
89.8
100.0
R
Ryan Whitton (Chicago, IL, US)
Love it! 2021 Sierra 1500

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

User picture User picture
J
Josh (Modesto, CA, US)
2024 Crew Cab 2500 HD w/ Bose

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

S
Sam Viernes (Honolulu, HI, US)
AWESOME

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

User picture
D
DeNella (Matamoras, PA, US)
Excellent

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

D
Derek Garrigus (Independence, MO, US)
Not worth the wait

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

B
Bryan (Dallas, TX, US)
NOT FOCAL

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.

A
Armand C. (Tampa, FL, US)
Fast and perfect!

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!

J
Joel (Albuquerque, NM, US)
Does the Job

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.

User picture
M
Marc Valles (Burleson, TX, US)
Plug and play!!!

So happy I went with this product!!! Hardest thing about installing my system was running the positive wire. Only thing I noticed, you have to really push the harnesses together or you have no audio what so ever. Still very happy with it! No running rca’s to the actual radio. RCA’s it comes with is perfect length

K
Kris Young (Apex, NC, US)
2025 Chevy Silverado RST with Bose

100% Plug and Play installation. Quality made harness, keeps everything factory looking without having to cut or splice into any factory wires. This harness is a must have if you like installations clean like factory

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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.

Read More
Read Less
Customer Reviews

Customer Reviews

Based on 52 reviews
88%
(46)
4%
(2)
2%
(1)
0%
(0)
6%
(3)
89.8
100.0
R
Ryan Whitton (Chicago, IL, US)
Love it! 2021 Sierra 1500

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

User picture User picture
J
Josh (Modesto, CA, US)
2024 Crew Cab 2500 HD w/ Bose

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

S
Sam Viernes (Honolulu, HI, US)
AWESOME

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

User picture
D
DeNella (Matamoras, PA, US)
Excellent

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

D
Derek Garrigus (Independence, MO, US)
Not worth the wait

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

B
Bryan (Dallas, TX, US)
NOT FOCAL

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.

A
Armand C. (Tampa, FL, US)
Fast and perfect!

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!

J
Joel (Albuquerque, NM, US)
Does the Job

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.

User picture
M
Marc Valles (Burleson, TX, US)
Plug and play!!!

So happy I went with this product!!! Hardest thing about installing my system was running the positive wire. Only thing I noticed, you have to really push the harnesses together or you have no audio what so ever. Still very happy with it! No running rca’s to the actual radio. RCA’s it comes with is perfect length

K
Kris Young (Apex, NC, US)
2025 Chevy Silverado RST with Bose

100% Plug and Play installation. Quality made harness, keeps everything factory looking without having to cut or splice into any factory wires. This harness is a must have if you like installations clean like factory

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