Before You Begin:
* Identify your mirror type: Is it manually adjusted or power-adjusted? This significantly impacts the process.
* Gather your tools: You'll likely need screwdrivers (Phillips and possibly flathead), possibly a socket wrench, and potentially some pliers. A trim tool is highly recommended to avoid scratching the paint.
* Obtain a replacement mirror: Ensure you get the correct mirror for your Impala year and model. Online parts suppliers and classic car parts specialists are good resources.
General Steps (Manual Mirrors are Simpler):
1. Inspect the mirror: Carefully examine how the existing mirror is attached to the arm. Note the screws, clips, or other fasteners. Take photos if needed.
2. Remove the mirror glass: Gently detach the mirror glass from the arm. This often involves removing a small retaining nut or clip on the back of the glass.
3. Remove the mirror arm: This is the most challenging part. Look for screws or bolts attaching the arm to the door. They are often hidden under small trim pieces. Carefully pry off any trim pieces using your trim tool. If the arm is simply bolted to the door, unscrew them. Some older models have clips that need to be carefully released. If you encounter resistance, stop and consult your repair manual.
4. Install the new mirror arm: Reverse the removal process. Carefully align the new arm and securely fasten it using the screws or clips.
5. Install the new mirror glass: Attach the new mirror glass to the arm, ensuring it's properly seated.
Power Mirrors (If Equipped):
Power mirrors are considerably more complex. Besides the mechanical fasteners, you'll also deal with electrical wiring.
1. Disconnect the electrical connector: Before removing the mirror arm, disconnect the wiring harness connected to the mirror motor. Note how it is connected to avoid errors during reassembly.
2. Follow steps 2-5 from the manual mirror instructions, but carefully manage the wiring. You might need to tape the wiring harness out of the way to avoid damage during the mirror arm removal and installation.
3. Reconnect the electrical connector: Once the new mirror is installed, carefully reconnect the electrical connector. Test the mirror's functionality.
Important Considerations:
* Door Panel Removal: In some cases, you may need to partially or fully remove the door panel to access the mirror mounting hardware. This adds considerable complexity.
* Repair Manual: A repair manual is invaluable. It will show you precisely how the mirror is mounted on *your specific* Impala and provide crucial details you might miss otherwise.
* Patience: This is not a quick job. Take your time and be careful to avoid damaging the door or paint.
If you're uncomfortable with this repair, take your Impala to a mechanic specializing in classic cars. They'll have the experience and tools to do the job correctly and safely.