AC not blowing cold air on driver side

[BigMike]

AC not blowing cold air on driver side

[CrawlSlow]

Make sure both control is set to cool if you have dual climate control.

[suess13]

Signed up to confirm this.  Below are the symptoms and resolution to this exact issue.

 

2014 GMC Sierra Denali

 

Symptom: On full blast AC mode, driver's side luke warm or hot, passenger side cold.

 

Resolution

1. Turn ignition and power off

2. Remove negative battery cable

3. Remove fuses 35, 55, & 56 from BMX fuse panel "inspect them"

4. Wait 5 minutes...

5. Reinstall fuses 35, 55, &56

6. Reconnect negative battery cable

7. Turn ignition back on

8. Don't touch HVAC controls for 3 minutes.

9. Test Driver vs Passenger side temps

 

Most likely the HVAC door actuator was out of calibration and a loss and return of battery power forces a recalibration of the unit.  Hopefully this helps someone needing clear and concise instructions.