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Welcome ! Please let us know if you need an help. For other T-harness options please visit T-harness.com. Thank you
Welcome ! Please let us know if you need an help. For other T-harness options please visit T-harness.com. Thank you

Our products are NOT sold at any AUDIO SHOPS or online retailers, however knock off copies are, be aware dont pay more for less. Stay authentic 👽

GM_GMC amplifier integration FAST Harness 2014-2018

  • 100% OFC copper wire
  • 120Watt RMS per channel safe
  • Use as a T or Loopback harness
  • OEM authentic connectors
  • Elite system Compatible
  • Original First of its kind design
  • Vehicle fitment below
  • Built in 10amp fuse
  • Molex connectors for ease of use
  • Price match eligible (info)
  • Bulk pricing available

Overview: Video

Original price $47.00 USD - Original price $47.00 USD
Original price
$47.00 USD
$47.00 USD - $47.00 USD
Current price $47.00 USD
Image 1 Description

Our F.A.S.T harnesses are just that a Factory Audio Signal Tap ! An economic version of our Original Elite system counterfeited by PAC audio /Stinger(LPH harness line). We created this audio harness line for those that want to build their own harness or repair someone else's "handy work". The F.A.S.T audio harnesses system is an inexpensive way to better your install craft and keep that vehicle resale value up.  It is compatible with our Elite Harness System as well. 

The Factory Audio Signal Tap harness comes with 3 parts.

  • The Base connector: that will connect between the factory audio source like a radio or amplifier.
  • The Speaker Accessory: that has the 4-channel speaker wire pairs by color. The Accessory can be used in as T-harness or Loopback harness.
  • The Fused Power Accessory: provides the 10 amp fused flow of constant 12 volts. and system ground.      

If its a speaker in your car, our harness will provide the high level signal on one end and let you build the rest from there. 

NOT ALL VEHICLES HAVE THE FACTORY WIRE SIZE TO HANDLE A LOOPBACK STYLE INSTALLATION! IF WE DONT OFFER A HARNESS IN THE LOOPBACK STYLE FOR A VEHICLE PLEASE USE THAT STYLE WITH CAUTION AND CHECK YOUR FACTORY WIRE SIZE! A simple solution is not always the safest!

  • Measure Screen from BOTTOM LEFT to TOP RIGHT corners. This harness is NOT compatible with the 7" screen.
  • THIS HARNESS WILL NOT WORK WITH BOSE systems. ( look at our Bose harness if you have a Bose system)

Thank you 😁

All LLJ products have a 5 year warranty.

CADILLAC

  • CADILLAC | 2015-2017 | ATS | Without Bose
  • CADILLAC | 2017-2019 | CT6 | Without Bose
  • CADILLAC | 2015-2019 | ESCALADE | Without Bose

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CHEVROLET

  • CHEVROLET | 2016-2019 | CAMARO | Without Bose or Boston acoustics
  • CHEVROLET | 2015-2019 | COLORADO | Without Bose
  • CHEVROLET | 2014-2019 | CORVETTE | Without Bose
  • CHEVROLET | 2017-2019 | CRUZE | Without Bose
  • CHEVROLET | 2018 | EQUINOX | Without Bose
  • CHEVROLET | 2014-2019 | TRAILBLAZER | Without Bose
  • CHEVROLET | 2018 | BLAZER | Without Bose
  • CHEVROLET | 2014-2019 | SILVERADO | Without Bose
  • CHEVROLET | 2015-2019 | CAPTIVA | Without Bose
  • CHEVROLET | 2015-2019 | SILVERADO HD | Without Bose
  • CHEVROLET | 2015-2019 | SUBURBAN | Without Bose
  • CHEVROLET | 2015-2019 | TAHOE | Without Bose

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GMC

  • GMC | 2015-2017 | CANYON | Without Bose
  • GMC | 2014-2019 | SIERRA | Without Bose
  • GMC | 2015-2019 | SIERRA HD | Without Bose
  • GMC | 2018 | TERRAIN | Without Bose
  • GMC | 2015-2019 | YUKON | Without Bose
  • GMC | 2015-2019 | YUKON XL | ALL
    Without Bose

AT FACTORY RADIO (HMI)

SUV'S

  • Under cup holder inside center console

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CARS-CROSSOVERS

  • Behind glove box

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PICK-UPS

  • Behind radio screen

Unique

Our designs are not just original they are both cost effective and durable.

Original

We work very hard to be original and design products that look nice but are affordable. Unfortunately some have taken advantage of our designs to over charge.

Because we know you wont need it

But just in case you do its there.

Function meets quality

We believe everything you buy should be an investment. With this in mind me manufacture products you can reuse .to maximize your investment.