have question about transmission wiring for 6.0 swap to a 98 suburban

i have been doing a lot of research about this and really can not find a straight answer.

I have a 98 4X4 suburban with a 5.7 that i am swapping in a 6.0 from a 2001 4X4 2500. i have the complete wiring harness and computer. i have read 2 or 3 different things about this topic. i know i need to keep my stock pcm to controle the abs, a/c, air bags, and some guages. the gray area for me in the tranny and speed sensor wiring.
Do i keep the tranny and transfer case wiring intact from the 98 and use it? or do i use the 6.0 harness (the plugs look to be the same)? if i have to go this route do i have to tie into the factory 98 harness? if so how.

thanks in advance.

Use the stock transmission and transfer case. Get the pilot extension for the torque convertor to extend it out to new engine's crankshaft pilot bore. I'm thinking it was Hughes that make the extension. The wires for the speedometer pickup sensor will need to be tied into the old PCM to make all the old equipment work.

You may not need the extension with the 2001 flywheel if its the flat model. The flat flywheel is used on the longer crankshaft and will mate up to the old converter without issue.

You Do Not have to keep the Black Box PCM to control the ABS, Airbags, A/C, or gauges. I would rework the stock harness to run the 6.0L I have a 2001 PCM controlling my 98 Distributored Vortec truck.

Jeff

lextech, i would like to know more info about how to eliminate the stock pcm. and only run one harness and pcm.

You can strip it down but its a whole lot more work, I mean a lot more work than just tieing into whats already there. I stripped both my 92 and 93 to nothing and tied the LS1 harness into the factory harness.

i want a clean install, and do not want a bunch plugs that do nothing all over the place. i know i am going to use most all of the plugs from the 6.0 harness for engine function. i am really stumped about the tranny functions. the harness i have is from a 4x4 and all of the plugs look to be the same, if i can use the 6.0 harness for engine and tranny functions how do i tie it into the factory 98 harness to make guages and the push button 4x4 work? or will i have to run 2 water temp and oil psi senders

I don't have the 2001 6.0L pinouts. RedHeartBeat is correct. It is a lot of work to integrate 2 harnesses together, But it makes for a much cleaner job---Just look at his truck. There are companies that can rework your 98 harness to suit your needs.

Jeff

do you know where i can find the pinouts for the 6.0 as well as the 98? i used to have a user name and password for all data but it does not work any more.

sent 2002 LS1 pinout for the PCM, the truck uses the same PCM so same pinout for the truck harness.

thank you