Install upgraded speakers in your GM SUV with this pair of Metra rear door speaker adapters. Compatibility with select Chevrolet Trailblazer, GMC Envoy and Oldsmobile Bravada models ensures a precise fit for sound system upgrades. These Metra rear door speaker adapters fit round subwoofers and coaxial units measuring 6-6.75 inches for versatility. | Metra | | Speaker Bracket for Select 2002-2009 Chevrolet GMC Trailblazer Envoy Envoy Denali Bravada Envoy | Black | Best Buy