ok when i press 4 hi or 4 lo the lights blink and the tccm (transfer case control module) clicks a few times, i took out the fuse for it and tryed to reset the tccm also looked at the vacuum thing under the battery tray and no vacuum leaks there. its xmas time and i cant afford to put this in a shop right now. I am stuck and no one in the s10 forum can help me. thanks in advance