Very welcome, I believe that is where it is located, there should be something on the cover showing which fuse is which, if not you will need a manual to find it.
Wait, I found a diagram that says it is for your car.
The only fuse listed that could be it is fuse #10, it says climate control system, now I am not an HVAC Tech, but I am pretty sure that is the one that controls the HVAC, it is obviously none of the others.
The diagram is hard to see since it is so tiny, but #10 looks to be two to the right from the top left, and then down one.
#? 2007 Buick Lucerne Under Hood Fuse Box Diagram ? Circuit Wiring Diagrams
I tried to find something that explains the procedure a bit better, but all I could find is this, it says it is for trucks and SUV'*...
Maybe somebody more familiar with HVAC'* could find better info.
HVAC Actuator Recalibration Procedure For GM Trucks and SUVs