Cruise acts up only in cold weather

I have a '97 Chevrolet Z71 Pickup.  I have had the truck for seven years and it has acted like this all seven.  When the temperature is low (about 60 or below), the cruise will work for a couple of miles and then it won't keep speed.  When the temperature is above about 60 degrees, the cruise works fine.  Does anyone have any idea what part of the cruise control system would be affected by the temperature?  I've lived with it this long, but enough is enough.  Any help would be greatly appreciated.  Thanks.

If the cruise is a factory unit, the problem may be in the stepper motor or main cruise module. It is mounted to the driver's side firewall. You could try using a can of cold spray on the module to simulate the cold weather to see if acts up. It is most likely this part of the cruise as it is the only piece of the cruise that has any electronic components that could be temperature sensitive. Confirm the diagnosis first, as the cruise module's aren't cheap.sparky

The cruise module is a stepper motor so yes there are moving parts. I believe it would have to get very very cold for grease to prevent the unit from operating properly. The problem is more likely caused by poor solder connections on the circuit board. Try the cold spray method as this is easier to simulate.sparky