Can anyone help me diagnose my 4 wheel drive or give a link to info? It is a 99 k1500 5.7L (same as the 98). The push button for the 4H blinks for a few seconds the goes back to 2H. Same with 4L. It did this once this summer, after a few tries it work, now it won't work at all. I don't want to start swapping parts, but i have no info on the axle actuator, transfercase actuator or tranfercase module. Any help getting me started would be appreciated. This is a bad time to be without 4 wheel drive.