GMC Envoy no air blowing from front dash vents, only from defrost and floor vents on GMC Envoy

Some GMC Envoy owners report experiencing issues with airflow, noting that air only blows from the defrost and floor vents rather than the front dash vents. This problem may be linked to a malfunctioning mode door actuator, which regulates the direction of airflow within the HVAC system. Additionally, some owners find that a stuck or worn air flow directions servo motor arm can prevent air from reaching the front dash vents. Changing the vehicle's battery has also been reported to cause air distribution issues, resulting in airflow being restricted to specific vents. Furthermore, a malfunctioning mode motor may require replacement to restore proper airflow. Lastly, issues with the air door actuator behind the dash could also contribute to the problem. It is advisable for owners experiencing these symptoms to have their GMC Envoy inspected by a qualified mechanic for accurate diagnosis and resolution.