2004 Chevrolet Monte Carlo Drivers side heater not working

AIR TEMPERATURE ACTUATOR REPLACEMENT - LEFT REMOVAL PROCEDURE Remove the left instrument panel (I/P) insulator. Remove the knee bolster bracket bracket. Disconnect the electrical connector from the left air temperature actuator. Remove the mounting screws from the left air temperature actuator. Remove the left air temperature actuator. INSTALLATION PROCEDURE Position the left air temperature actuator. Align the slots in the electric actuator driver to the flats on the shaft. Align the locating hole to the alignment pin on the HVAC module case. Slide the actuator on the shaft. The actuator driver should seat completely onto the shaft and the mounting holes should be flush with the mounting screws on the HVAC module case. NOTE: Refer to Fastener Notice in Service Precautions. Install the mounting screws to the left air temperature actuator. Tighten Tighten the screws to 1.5 N.m (13 lb in) . Connect the electrical connector to the left air temperature actuator. Install the knee bolster bracket bracket. Install the left I/P insulator. Calibrate the actuator.