i did mine a few months ago
at the bottom there are 2 plastic nuts that you need to take out. you unscrew them a bit then just pull them out
where the inner pull handle (the one to open the door) is, there is a little round cover that pops off when you push it at the right side. unscrew the screw behind
then the other handle (the one you would pull to close the door) needs to come off
there is a plastic cover around and about the handle part, this is clipped on and needs to be prised off. be careful though cause it seems it might be easy to snap. unplug the window switch, remember which plug goes where on the drivers side.
there are 2 torx 25 screws holding the handle in.
after all this, the card is ready to pull off. its held in firmly by plenty of clips. be careful when pulling though cause the door lock cable is still attached. There is a clip to get this off but be careful to note how it was connected cause it has to go back exactly the same.
then you have 4 screws holding in the speaker
disconnect the cable
you will have to cut off the connector and then add spade connectors to the wires to connect the new speakers. i left a bit of cable on the connector incase i needed to put the old speakers back, but make sure the cable in the car is long enough to reach the speaker.
reverse procedure when putting everything back
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2015 Chevrolet Camaro ZL1