Need info for putting a 4.8 or 5.3 in a 1992 k1500

[Ireland]

I should also ad that I want to keep my old cable style transfer case, it's a np241 I believe

[gagliano7]

I have a 5.3 in my 1992 but I have a manual trans. I would get a standalone harness. The tach you disconnect from your motor now and connect it to the new harness. You may need to program the pcm for the tach to read correctly. For the temp sensor I used the 1998 Camaro 3 wire sensor and it reads perfect for my truck. I connected my speedo from new pcm to the drac box behind glove box and spliced my tranny vss sensor into the new pcm. Made sone corrections in hptuners and my speedo reads perfect. On my standalone harness I only had to connect 4 wires(auto trans will have a few more wires). I left my ignition the same as before just connected it to the 5.3 starter. I wired the new alternator the same as the old and my charge gauge works perfect. I also used the distributor power wire for my constant power to my new pcm so there is power while cranking. The power steering lines will work with the 5.3 pump. The radiator hoses i used from a 5.3 and they worked with my 1992 radiator.

[jcrumpley]

My 92 is wired exactly like gagliano7. I used a psi stand alone harness. Mine is a standard shift but I used a psi harness for a 4l60 in case I wanted to switch to an automatic later. I just taped off the trans plug. Hooking up a 4l60 is just a matter of plugging in the trans plug from the harness.