Ok, how do I reset the doors and actuators?

This was my original question, "2004 chevy silverado ac is on but passenger side vents only but out hot air while driver side put out cold air though doorside vent blows low so when on high seems like its on low." Kelly answered, "ONE OF 2 THINGS LOOK THAT UP IN YOUR SEARCH ENGINE > 2004 chevy silverado ac on hot air on driver side < there is a little way to try and reset the doors and actuators first...". So that is why I asked the question above.

TY