Here's a general procedure for replacing it. Remember this is a general guide, and you should always consult your vehicle's repair manual for specific instructions and diagrams:
1. Disconnect the battery's negative terminal. This is crucial for safety to prevent electrical shorts.
2. Remove the glove box. This usually involves releasing clips or screws. Refer to your owner's manual or a repair manual for your specific truck model. Some glove boxes simply swing down, others might need more extensive removal.
3. Locate the blower motor resistor. Once the glove box is out, you should see a small, usually black, rectangular unit. It's often mounted to the HVAC housing near the blower motor. It might have wires connected to it.
4. Disconnect the electrical connectors. Carefully unplug the electrical connectors from the resistor. Take note of how they are connected to make reassembly easier.
5. Remove the resistor. There may be screws holding the resistor in place, or it might simply be clipped into a bracket. Carefully remove it.
6. Install the new resistor. Install the new resistor in the same location and orientation as the old one. Make sure it's securely fastened.
7. Reconnect the electrical connectors. Carefully plug the electrical connectors back into the new resistor, ensuring a secure connection.
8. Reinstall the glove box. Put the glove box back in its place and secure it.
9. Reconnect the battery's negative terminal.
10. Test the blower motor. Turn on your ignition and test all blower speeds to verify the new resistor is working correctly.
Important Considerations:
* Repair Manual: A repair manual specific to your 2005 Chevy truck model (Silverado or Colorado) is highly recommended. It will provide detailed diagrams and instructions. You can find these online or at auto parts stores.
* Photography: Take pictures before disconnecting anything. This will help you remember how everything goes back together.
* Tools: You'll likely need a screwdriver (possibly both Phillips and flathead), possibly a trim removal tool to avoid scratching plastic parts, and potentially a socket wrench depending on how the resistor is mounted.
* Safety First: Always disconnect the battery before working on any electrical component.
If you're not comfortable performing this repair yourself, it's best to take your truck to a qualified mechanic. Improper installation could lead to further damage or even fire.
