GMC Envoy mode door actuator malfunction causing clicking noise and temperature control issues on GMC Envoy

Some GMC Envoy owners report experiencing issues with a malfunctioning mode door actuator, such as a clicking noise originating from the center of the dash or rear of the vehicle. These problems can lead to temperature control issues, including the blend door being stuck in one position, resulting in hotter or colder air than desired. Additionally, owners have noted symptoms like no air coming from the dash vents, inconsistent air temperatures between the driver and passenger sides, and clicking noises during recalibration attempts. Troubleshooting may involve unplugging the actuator and checking the mode door linkage shaft for proper movement, while some have found temporary relief by resetting the system through fuse removal. However, if the actuator is faulty, a replacement may be necessary to restore proper functionality and temperature control.