Tools You'll Likely Need:
* Socket set and ratchet: Various sizes, likely including metric.
* Screwdrivers: Phillips and flathead, various sizes.
* Panel removal tools: To avoid scratching the interior trim. Plastic pry tools are best.
* Torx bits (possibly): Some Tahoes use Torx screws.
* Wire cutters/strippers (if needed): For cutting and connecting wires.
* Electrical tape or connectors: To secure wire connections.
* New power window motor: Make sure you get the correct one for your specific door. The part number should be on the old motor.
Steps:
1. Disconnect the Battery: This is crucial for safety to prevent electrical shorts. Disconnect the negative (-) terminal first.
2. Remove Interior Door Panel: This is the most tedious part. The exact procedure varies slightly by door, but generally involves:
* Removing the door handle screws.
* Removing the screw(s) in the armrest.
* Carefully prying the panel away from the door, using panel removal tools to avoid damage. There are usually clips holding it in place. Work your way around the perimeter. Be gentle! Look for any hidden clips or screws.
* Disconnect the wiring harness for the window switch and any other components attached to the panel (e.g., courtesy light).
3. Access the Window Regulator: Once the panel is removed, you'll see the window regulator mechanism. The window motor is usually attached to it.
4. Disconnect the Window Motor:
* Unplug the electrical connector: Carefully unplug the electrical connector from the window motor.
* Remove mounting bolts: Unscrew the bolts holding the motor to the regulator. The number and location of these bolts will vary depending on your specific model.
5. Remove the Old Motor: Carefully remove the old motor from the regulator. Take note of its position and orientation – this will help with installation.
6. Install the New Motor:
* Align the new motor with the regulator in the same position as the old one.
* Secure the new motor with the mounting bolts.
* Plug the electrical connector back into the new motor.
7. Reassemble:
* Carefully re-install the window regulator assembly.
* Re-attach the interior door panel, making sure all clips are securely engaged.
* Reconnect the wiring harnesses.
* Re-attach any screws you removed.
8. Test the Window: Connect the battery, and test the power window to make sure it operates correctly.
9. Reconnect the Battery: Connect the positive (+) battery terminal.
Important Considerations:
* Consult a Repair Manual: A Haynes or Chilton repair manual for your 1999 Chevy Tahoe will provide detailed, illustrated instructions specific to your vehicle. This is highly recommended.
* Take Pictures: Before you start disassembling anything, take pictures of each step. This will be invaluable during reassembly.
* Window Regulator Condition: While you're in there, inspect the window regulator for wear and tear. It might be a good idea to replace it if it's damaged, as it's often easier to do it all at once.
* Professional Help: If you're not comfortable working on your car, it's best to take it to a qualified mechanic.
This is a general guide. Variations exist between models, even within the same year. Always prioritize safety and consult your repair manual for precise instructions. Failing to follow proper procedures can lead to damage to your vehicle or personal injury.
