I have a 1999 chevy tahoe 4wd. I switched it into 4 low on accident thinking it was 4 hi and now when I go to switch it back into 4 hi or 2 hi it blinks for a couple seconds and I here a couple clicks like its trying to switch into it but its not letting it. I checked the fuse and that's fine. I tried backing up a few car lengths and putting it into neutral and doing it again. Could really use some help right now.