On the far left and far right of the dashboard there are 2 vented compartments that pop out. Your speakers are located here. Take these off, unscrew the old speakers, disconnect speaker wires, and remove speakers. To install new speakers, do the same steps, just in reverse.
The rear speakers in a Toyota solara convertible, you must first remove the existing speakers by removing the cusions from the back of the seats and then accessing the main wire panel to discconect them.
You will need to remove the speaker covers in your 2006 Chevrolet Silverado. Remove the speaker retaining screws. Remove the wiring harness from the back of the speakers. Reverse the process to install the new speakers.