Axxess AXSUB-GM4 Add-A-Sub Interface for select Chevrolet and GMC 2019-up vehicles

Axxess AXSUB-GM4 is a vehicle-specific Add-A-Sub data interface designed to add aftermarket subwoofer signal to compatible factory-radio systems. The patented AXSUB interface processes low-frequency signal that may be limited by the factory radio, helping an added subwoofer amplifier perform properly while the factory source unit remains in place.

Key Features

• Plug-and-play Add-A-Sub data interface for adding an aftermarket subwoofer while retaining the factory radio
• Designed for non-amplified systems
• 2-channel non-fading 5V RMS output
• Fixed low-pass frequency of 234Hz
• 250mA remote turn-on output
• Bass knob included for subwoofer level control
• Vehicle-specific harness included
• Installation done at the radio location
• Micro-B USB updatable

Vehicle Fitment / Application

select Chevrolet and GMC 2019-up vehicles

Applications listed by Axxess include Chevrolet Camaro, Cheyenne 1500, Colorado New Style, Cruze, Equinox, Malibu, Silverado, Sonic, Spark and Traverse; and GMC Canyon, Sierra and Terrain with IOR notes where listed.

Important: AXSUB interfaces are application-dependent. Always verify final fitment by year, make, model, trim, factory radio code, factory amplifier status, ANC/audio package, and current Metra / Axxess fit guide before purchase or installation.

Installation Notes

• Installs at the radio location using the vehicle-specific harness
• Designed to provide subwoofer amplifier signal and remote turn-on output without replacing the factory radio
• Bass knob provides convenient subwoofer level control
• Professional installation is recommended for amplifier integration, gain setup, and subwoofer tuning
• Check the latest Metra / Axxess instructions before installation

What’s in the Box

• Axxess AXSUB-GM4 Add-A-Sub interface
• Vehicle T-harness
• Bass knob

Technical Specifications

• Brand: Axxess
• Model: AXSUB-GM4
• Product Type: Vehicle-specific Add-A-Sub data interface
• Application: select Chevrolet and GMC 2019-up vehicles
• Vehicle System: non-amplified systems
• Audio Output: 2-channel non-fading 5V RMS output
• Low-Pass Frequency: Fixed 234Hz
• Remote Output: 250mA remote turn-on output
• Update Port: Micro-B USB
• Sold As: Each

Identifiers & Packaging

• MPN: AXSUB-GM4
• UPC: 086429435289
• Sold As: Each
• Included Components: Axxess AXSUB-GM4 Add-A-Sub interface, Vehicle T-harness, Bass knob

Why Buy From MCOR Automotive

• Authorized retailer for the brands we sell
• Specialists in vehicle audio integration, radio replacement parts, and installation accessories
• 22+ years of professional automotive electronics experience
• Expert support for compatibility verification and proper setup