01 Bravada smart trac

01 bravada 62,000 miles.the front wheels do not engage,checked the fuse's 4wd (in car) and atc (under hood) both good.Checked in the snow,only back wheels spin any ideas.Oh and there is no stange noises or such.would changing out the diffs and transfer case fluids possibly remedy this?

Frogot to mention there is no awd light on.Any suggestions?

I'm not familiar with the electric clutch transfer case equipped Bravadas. If I found myself in your situation, I'd check eBay for an '01 factory service manual and figure it out. This site needs someone to have a handle on those transfer cases because their malfunctions aren't going away.

I went and had all the fluids changed,transfer,diffs and trans flush.seems to be working now :) But the turning is still a bit stiff,ah well its the wifes car and she doesnt seem to mind. Thanks for the response Chris.