Metra ANC-GMH1 GM Active Noise Cancellation Bypass Harness

This active noise canceling bypass harness ensures smooth speaker and subwoofer upgrades in select GM vehicles with amplified ANC audio systems and covers a variety of RPOs. It maintains proper communication between audio equipment and the ANC system, giving listeners full control over their music without sound distortion, interference, or conflict between devices. Within ANC systems, built-in microphones detect and eliminate background noise in a vehicle but often mistake aftermarket speakers and subwoofer vibrations for interference, creating compatibility issues. Audio system upgrades can also affect a vehicle’s sensitive electronics, causing system errors. Axxess’s ANC bypass harnesses prevent these issues while giving installers more flexibility in their audio system design, as they will no longer have to avoid ANC microphones within the vehicle’s interior. All Axxess products come with full support from Axxess integration professionals, who are available to call for technical support seven days per week.

• Active noise canceling bypass harness
• Designed for select GM vehicles with amplified ANC audio systems; verify RPO and exact fitment
• Enhances sound quality during audio system upgrades
• Eliminates unwanted ANC interference for complete sound customization
• Protects vehicle electronics
• Quality connectors

Confirm the exact vehicle, trim and equipment in Metra’s fit guide. Additional installation parts may be required.