How do I Replace a Blower Fan Resistor on a 2005 Silverado?

The blower fan resistor on a 2005 Chevrolet Silverado regulates the current to the blower motor, allowing the blower fan to operate at different speed settings. When this component fails, the blower fan may not respond to certain settings or may be stuck on one setting. The blower fan resistor is located underneath the dashboard on the passenger side of the vehicle. Replacement blower fan resistors are available from local auto parts stores, Chevrolet dealerships and online auto parts websites.

Things You'll Need

• 1/4-inch ratchet
• Metric socket set
• Replacement blower motor resistor

Instructions

1. Shut down the engine, shift the transmission into park or first gear for manual transmission. Set the parking brake and turn on the interior dome light. Exit the vehicle and open the passenger side door.

2. Shine a flashlight underneath the dashboard on the passenger side of the vehicle. Locate the blower fan resistor. It is on the inside of a small, 3 inch by 1 inch rectangular panel that is held in place with two gold-colored metric steel screws.

3. Remove the screws with a 1/4-inch ratchet and a metric socket. Remove the blower fan resistor from the dashboard compartment and disconnect its electrical connector.

4. Reconnect the electrical connector to the new blower fan resistor. Place the new resistor inside the dashboard compartment and reinstall the two metric screws.

5. Turn the ignition to the "ON" position and test the fan on all speed settings to ensure that it operates properly.