In the other 4x4s we have the central diff lock is manually selectable, along with the ratios.

In the full fat however it is all automatic, i cycle the low/high ratios quite often, but obvoiously cant engage the diffs.

Is there any way to make them engage ? Is it necessary to give them a bit of use now and then to prevent seizure?

I remember on our colorado a few years back the lever completely jammed in high and unlocked, dont want them to jam on the ff.

Also i know that an active rear diff was an option but i seem to have a lock icon over the rear diff on the 4x4i screen, does this mean i have one?

Cheers guys im sure one of you will know better than me.  There is nothing that can't be fixed with a hammer😜😜
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