Low-frequency speakers are installed in the front doors, and high-frequency speakers are in the decorative frames of the interior door handles.
To replace the high-frequency speaker, remove the decorative frame of the inner door handle (see Removal the front door trim).
Using a Phillips screwdriver, unscrew the two speaker mounting screws.
We remove the high-frequency speaker from the frame of the inner handle.
We install the high-frequency speaker in the reverse order.
To replace the low-frequency speaker, remove the front door trim (see Removal the front door trim).
By pressing the lock of the wiring harness block, we disconnect it from the speaker wiring block.
Using a Phillips screwdriver, unscrew the four screws securing the speaker.
We remove the speaker with the spacer.
Using a Phillips screwdriver, unscrew the two screws and remove the speaker from the spacer.
We remove the speaker wire block from the spacer.
We install the low-frequency speaker in the reverse order.
(The original article can be found on the resource: ChevyMan)