I counted 58 for the LaCrosse, not counting anything that is touch based on the Nav screen and not counting AC vent wheels. (Which would substantially increase it.)
I count 51. Counting every teeter button as 2, steering wheel buttons, headlight control dial, and windows on the center console. Not counting AC vent wheels.
If counting the only physical buttons, it would be down in the high 20s I'm sure.
Count 47 for this, including the window buttons moved to the arm rests on the doors. Counting every teeter button as 2, steering wheel buttons, and ignition and headlight controls. Not counting AC vent wheels.
