Hello I am currently in the process of installing a 2002 5.3 chevy engine into a 1997 k1500 4x4 I am wondering if there is a company that builds a stand alone harness for the transfer case? I have already installed the chinese standalone harness for the engine but I am trying to make the 4 wheel drive work next. The truck had a 5.0 with a 4l60e tansmission and a NP243c transfer case (I think that is the transfer case that came in it) I am using the transmission and the transfer case that came in it. Any help would be greatly appreciated. this is a push button 4wd

 

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Remove the tranfer case wiring from your factory harness, pin it correctly into the PCM, swap in a 4x4 transmission segment from a newer truck using that style transfer case. I have done P01/P59 swaps and tunes on several L31s using the stock 4x4 transfer case wiring making their push button AutoTrac tranfer case work.