Which actuator requlates rear heat in a 2003 Tahoe?

In a 2003 Chevrolet Tahoe, the actuator that regulates rear heat is the rear mode actuator. This component controls the airflow and temperature for the rear climate control system. It adjusts the position of the blend doors to mix hot and cold air, ensuring the desired temperature is maintained in the rear passenger area. If you're experiencing issues with rear heating, this actuator may be a common culprit.