- 1). Fold down the Cobalt's rear seat-back cushion.
- 2). Remove the left and right upper lock pillar garnish moldings (the trim surrounding the rear quarter panel windows) by releasing the nine clips -- four on the bottom, two on the front and three on the top -- with a trim stick. Pull the moldings from the vehicle.
- 3). Lift the front of the rear window shelf trim panel and disengage the two clips holding the rear of the panel in place, using a trim stick. Pull the panel from the Cobalt, exposing the rear speakers below it.
- 4). Remove the four screws holding each of the rear speakers on the rear window shelf, using a ratchet and socket. Pull the speakers out and disconnect the wires plugging into the bottom of each speaker.
- 5). Plug the wires into the new speakers and set the speakers in the holes on the rear window shelf. Tighten the four screws on each speaker to 1 to 2 foot-pounds, using a torque wrench and socket.
- 6). Set the rear window shelf trim panel back in place and engage the clips on the rear of the panel into the rear window shelf.
- 7). Place the upper lock pillar garnish moldings back in place over the rear quarter windows and press the moldings to snap the retaining clips into place.
- 8). Pull the rear seat up and lock it into place.
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