American International GMSB356 Speaker Adapter for 2005–2020 GM Vehicles – 6.5" to 6.75" Car Speaker Mounting Brackets

Upgrade your vehicle’s sound system with the American International GMSB356 Speaker Adapter, engineered specifically for select 2005–2020 GM vehicles. These speaker adapter brackets allow you to easily install 6.5-inch to 6.75-inch aftermarket speakers into factory locations without the need for cutting or modification.

Constructed from durable ABS plastic, these adapters provide a secure and stable mounting surface, improving both installation ease and overall sound quality. Designed to align with factory bolt locations, they ensure a clean, professional installation—perfect for car audio upgrades.