Here's a general guide, but you should consult a repair manual specific to your year, model, and trim level for precise instructions and diagrams. These manuals often include pictures making the process much clearer. You can find these online (e.g., Haynes, Chilton) or at auto parts stores.
General Steps (May Vary):
1. Remove the Interior Door Handle: Usually, there's a small access panel or screw behind the door handle. Remove this panel to access the screws holding the handle in place. Remove the screws and carefully pull the handle off.
2. Remove the Door Panel Screw Covers: Most 2003 Chevy truck door panels have plastic covers hiding screws. These covers usually pop off with a small flathead screwdriver or trim tool. Pry gently to avoid breaking them.
3. Remove the Door Panel Screws: Once the covers are off, remove all the screws holding the door panel in place. These are typically located around the perimeter of the panel.
4. Disconnect Electrical Connectors: There are several connectors behind the panel for power windows, locks, and possibly speakers. Carefully unplug these connectors. Take pictures or make notes to ensure you reconnect them correctly.
5. Release the Panel Clips: The door panel is held in place by plastic clips along the edges and often at the bottom. These clips can be stiff. Start at the bottom and gently pry the panel away from the door using a trim tool or flathead screwdriver. Work your way around the panel, releasing the clips. Be careful not to break the clips.
6. Remove the Door Panel: Once all the clips are released, gently pull the door panel away from the door. Be mindful of the wiring harnesses.
Important Considerations:
* Trim Tools: Invest in a plastic trim removal tool set. These prevent scratching the door and make removing the clips much easier.
* Patience: This process can be a little time-consuming and requires patience. Work slowly and methodically to avoid damaging the panel or door.
* Photos: Take pictures as you go. This will be invaluable when putting the door panel back together.
* Manual: A repair manual is highly recommended. The specific location and number of screws and clips can vary.
If you're unsure about any step, it's best to consult a professional mechanic. Improper removal can damage the door panel or door itself.