Hi all, These two issues may or may not be connected, but the steering problem is this biggest issue. The steering issue is that sometimes when we are driving and making a turn the steering wheel sorta slips. It's like it moves further toward the direction we are turning without the wheels turning and when it catches the wheels will turn further to catch up with the steering wheels position or, if we hold the wheel steady, the wheels will move out of the turn slightly. I thought was an issue with our power steering so I had our mechanic check the steering and he couldn't find any issues, but when my husband explained what was happening our mechanic said "Oh! That's an issue with your 4WD. Just go to an open area, switch into 4LO or 4HI, put the suburban in drive and swing the wheel left and right while letting the truck roll in drive without pushing the gas. After working the wheel left and right a few time, repeat the procedure in the other 4WD setting. Do this now and then to get grease in there." Apparently the differential is slipping out of 2WD or something to that affect sometimes while we're turning. We hadn't used the 4WD at all up until that point, except for engaging the 4WD once on accident. Did this and it seemed to fix it temporarily. Sometimes this fixes the steering issues for a while and sometimes it doesn't, but it brought issue number 2 to our attention. Sometimes when I start the suburban the 2WD selector switch light won't be lit. Sometimes while I'm driving I look down and notice that the 2WD selector light isn't on. I can hold the button down and sometimes it'll light and sometimes it won't. If I let go it may or may not stay lit and if it does stay lit it might still be temporary. If we switch to 4LO/4HI we get the same results, but we hear/feel the 4WD kick in. We're going to check the fuses tomorrow and we also might change out the 4WD actuator. Any ideas if we're on the right track to fixing our issues, or any advise? We're lost, this is our first 4WD.