The problem is this, my dash lights other than the DIC and Radioscreen which both stay bright 24 hours a day are not lit during the day no matter what I do. The dimmer control has no effect. The automatic feature works fine switching from day to night modes
I'm having a bit of a problem parsing the sentence. Yes, the DIC and Radio are on all he time, but should react to the dimmer at night.
The dash lights will be off during the day, but will be lit and dimmable at night.
The US Cruze comes with automatic light control, so the lights switch automatically between DRL mode (day) and headlights mode (night). I'm not sure if the Canadian Cruze is automatic or not.
I do recall that the radio dimming in reaction to the light sensor - not necessarily in reaction to the headlight control. So you may have to observe what the car actually does day/night and not try to simulate it.