This Metra 40-GM21 adapter lets you connect an aftermarket antenna to your compatible 1998-2008 GM vehicle's factory-installed radio. Copper, polypropylene and steel materials and copper shielding provide durability.
For use with your existing model.
Enables you to connect an aftermarket antenna to a GM factory-installed radio with a mini barbless connector.
Offer a durable design.
Promotes optimal performance.