:duh::duh: I have 2005 titan during the first snow . I was driving and i notice that the SLIP and ABS light came on. when i went to put it in 4wd it wouldn't engage. The slip and abs light comes on and goes off. Sometimes it's off for awhile and comes back on.Everytime i call the dealer to take it in the light goes off. But Lately the lights are on and won't go off now what to do?.