Quote Originally Posted by BOTTLEDZ28 View Post
Good to know My truck is my DD too and I know exactly how you feel about the wiring needing to look perfect. I did exactly that with my camaro build. I ripped out the entire engine harness and tossed in in favor a stand alone hanress from FAST. I then grafted the needed circuits to it and away it went. It took a while but the end result was a very neat and uncluttered engine compartment AND the wiring was done correctly. It sucks when we try to mod our DDs because time ends up dictating the quality of our work sometimes.

Im still torn right now on what to do with the harness side of things. My brain is about to explode from reading this forum, gmt400 and lt1swap!! Just when I think I have a good grasp on what needs to happen and what parts I need, I find someones elses build thread and BAM, they did something different.
Thats exactly how I felt when researching mine. I just made sure I had all the parts I needed to mail order were on hand before starting and the rest of them I had delivered from the parts store while working on it.

You could use the wiring on the LS motor and just remove the unneeded wiring from the OBS engine harness and leave the trans harness alone and just pin them in to the 411. Splice the cruise wires in to the TAC module that will mount in the same location as the cruise. Repin the data wire from OBS PCM to LS PCM so the OBDII port still works.

When I did mine, I used Lextech, LT1swap and Alldata diagrams to make sure all was correct. The only think that was messed up with mine were the o2 sensor wiring. I am gonna go speed density on mine so I wont need them anymore.