I am swapping in a 5.3 4l60e combo into a 1990 c1500 that originally had a 355 700r4 biggest thing I need help with is wiring if there is somewhere close in omaha, Ne I can send it to or someone help me out and walk me through it

 

lt1swap.com has all the info you need to do it yourself. Or you could send it to a few places or just buy one that is made for your swap from Nelson, PSI, etc.

 

How hard is it to do I don't have much knowledge on wiring work and how much would it be to buy a new one

 

The aftermarket harnesses are pretty much plug and play and have a 3 wire hook up to get em going.

The biggest pain in the *** is going through and deleting all the factory wiring you don't need if you want to clean it up under the hood.

 

Lt1 swap.com is very helpful. If you take your time and follow directions from this site you will save a lot of money.

 

my brother is away on holidays right now but he did his own harness on his 92 5.3 swap.
when he gets back I will ask him where he got his info from and if he has any tips

 

I did my own. Got all my info on lt1swap.com. He literally has a step by step. And the pinouts for the LS. I also used alldatadiy to get the wiring diagrams for my truck to figure out ABS and cruise (I have yet to see if what I did will work on ABS and cruise)