This is what the mode door actuator looks like if this is any help.
Around a 23 buck part. Whole idea is to operate a door remotely three different systems were used over the years.
In a sense, cables gave problems, mostly because of the materials used, would rust and the lubricant would dry up, and cable is like a towing chain, very good at pulling, but kind of worthless for pushing, end of the cable would bend when being pushed.
GM has been using the electric actuators for years, mostly in pickup trucks and seem to be the most problematic.
Feel the most reliable systems were vacuum operated, used a double vacuum actuator where neutral was vents, pull the upper one for defrost, lower for the floor. So in either case, were pulling, and a stalled vacuum actuator doesn't burn up like an electric can.
Did to my homework before buying the Cruze, when I learned the MVAC system was all electrical, said to myself here we go again, said the same thing about the rear disc calipers that also have been problems for years, GM could never get this right.
But purchased it anyway, ha, namely with $4,700 on my GM card, was a nice discount.
I know on these cold mornings will need the defrost, so at night when parked, leave it in the defrost position with the blower motor off. Only switch to floor or vents after the car is good and warm, they last longer this way. Same with the AC, switch the compressor off about 3-5 minutes before getting home with the blower at max to dry out the evaporator. If I don't, will get mold buildup.