The Genuine OEM Dash A/C Heater Control 84963890 is specifically tailored for 2020-2023 GMC Sierra 2500 and 3500 models. This control unit manages the vehicle's air conditioning and heating systems directly from the dashboard, allowing the driver and passengers to adjust cabin temperature and airflow for optimal comfort. Originating from the OEM manufacturer's packaging, this component mirrors the part available at new car dealerships, distinguishing itself from any aftermarket alternatives.
- Flathead screwdriver
- Phillips head screwdriver
- Panel removal tool
1. Ensure the vehicle is turned off and the key is removed from the ignition.
2. Using the panel removal tool, gently pry off the dashboard trim that surrounds the A/C heater control unit.
3. With the trim removed, locate and unscrew any screws securing the old A/C heater control unit in place using the Phillips head screwdriver.
4. Carefully pull the old control unit forward to expose its rear connectors.
5. Disconnect the wiring harnesses attached to the back of the old control unit.
6. Position the new Genuine OEM Dash A/C Heater Control 84963890 in place and connect the wiring harnesses to the respective connectors on its rear.
7. Push the new control unit into its designated slot in the dashboard and secure it with the previously removed screws.
8. Realign the dashboard trim around the A/C heater control unit and press it into place until it clicks securely.
9. Turn on the vehicle and test the new control unit's functions to ensure proper operation.
Time Required: Approximately 1 hour
Skill Level: Intermediate