Hello my name is XXXXX XXXXX X will be more than happy to assist you.
Is yourXXXXXthe Automatic Push Button Type, or the Manual with a shifter on the floor to engage theXXXXX
My truck is a Manual 4WD shifter on a automatic transmission (4L80E) and also a one ton. My origional question was "I need a wiring diagram for a 1999 Chevy truck K3500 -- 4WD wiring". Do you have?
Here is the elecrical diagram for the manual 4X4 system