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Welcome to our new Site We are adding some final touches. For other T-harnesses Options please visit Thank you
Welcome to our new Site We are adding some final touches. For other T-harnesses Options please visit Thank you
What is ANC?

What is ANC?

The symptoms will only happen when the vehicle is in drive or reverse.

  • Feedback when the sub is playing
  • Thumping of rapid off beat rattling from the sub
  • Humming

ANC is not used in vehicles that are designed for offroad use. Microphones can be found in the headliner.

GM/GMC ANC bypass harness (Select Vehicles) 2018-2023

Original price $15.00 USD - Original price $15.00 USD
Original price
$15.00 USD
$15.00 USD - $15.00 USD
Current price $15.00 USD
in stock, ready to be shipped


PAC and Metra(Axxess) sell stolen copies of our ANC bypass harness. Some of the fitment & information they provide is incorrect and does not reflect on our products.

Our GM/GMC ANC bypass harness works for vehicles without a Bose amp or a Factory amp. This ANC bypass harness plug in at the GM ANC module. We designed and tested it to help you avoid any feedback from your aftermarket equipment by looping through the signal. This will plug in at the ANC module, which is typically located under the center dash to the right of the gas pedal in the center console or in the trunk on the driver side. The connector on your ANC module may be either Black or Green, it will be a 16 pin connector.

2018-2021 Terrain
2018-2020 Trail Blazer
2018-2020 Equinox
2019 New Body-2021 Impala/Malibu

2017-2020 Encore
2017-2020 Lacrosse

This WILL work for any vehicle that does NOT have a Bose AMP or Factory AMP.

Designed and built in the U.S.A by LLJ Customs. Stolen by PAC Audio and METRA elec.

This ANC bypass is designed to disable the ANC in any Chevy, GMC SUV or crossover vehicle with the None Bose ANC module under the center console.

  • 2018-2023 ONLY
  • Silver 3 plug unit can be accessed by the gas pedal


This ANC bypass plug in at the amplifier.


  • Under center counsel, silver 3 harness unit. Plugs in at the large 16 pin harness.


Is there another way to disable my ANC?

Yes there are a few other ways.

  1. Cut the wires at the factory amp. (absolutely not recommended)
  2. Prop the headliner and disconnect the ANC microphones (does not always work)
  3. Some vehicles have the ability to disable in the software. (this can turn back on by itself)
After about 20 minutes that I turned off my vehicle, my subs will start to make a loud rumble. Why? Is this ANC?

NO, this happens when the vehicles security system sends a signal to the radio or amplifier that triggers the LOC or amp on.

Using DC offset OR audio turn-on will fix the problem for you. This can happen with vehicles regardless of having ANC.

Where do I plug in this bypass?

There are 3 places you can and it depends on the vehicle manufacturer and equipment.

  • Factory radio
  • Factory amplifier
  • Factory ANC module

Our harnesses have a 'where to plug in at' section for each bypass harness.