Replacing speakers in a vehicle is one of the simplest and most cost-effective ways of improving the sound in your car. The Chevrolet Colorado is a good candidate for speaker replacement–the process is straightforward and fairly simple, and you can improve the sound in your ride with only a small investment in time and effort.
Items you will need: Panel tool, Phillips head screwdriver, Pencil, Speaker, Drill, Sheet metal screws
Use a panel tool to pry out the top of the “sail” panel–this is the triangular plastic panel at the front edge of the window/door intersection. Lift the panel up and pull it away from the door when the clip holding it releases.