Q: How do you remove a radio and replace a speaker in Chevrolet Trailblazer and Buick Rainier?
A: To remove the radio, start by disconnecting the negative battery cable. If you're working on a Chevrolet model, remove the lower center insulator panel from the instrument panel. Then, remove the accessory trim plate from the instrument panel on all models. Next, remove the mounting screws, pull the radio out of the instrument panel, disconnect the connectors, and finally remove it from the vehicle. To install the radio, simply follow the reverse steps of the removal process. To replace a door speaker, remove the door trim panel. For a front dash-top speaker, remove the instrument panel upper trim pad. Remove the speaker mounting screws, pull the speaker out, disconnect the electrical connector, and remove the speaker from the vehicle.