[JJorgensen52]

Originally Posted by FarmerSid

Thanks for the info. Understand the ECM flash and that's why I may go back again to Blackbear. The tranny and harness the junk yard has is from an 05 I think but are you saying that I should get the tranny and harness from the 05 and it will work on the 07?

Never said anything about flex fuel but will ask. So I should get the gas pedal out of the truck the ECM and harness came out of?

Yes, for DBW you will need the throttle pedal and the extension harness for it (there's a connector up under the dash).

The '07 had a standalone TCM, in the '05 it's part of the ECM - so if you get the '05 harness and an '05 ECM, it should be able to control the trans. I had misunderstood and thought you had an '07 ECM.

It would be easiest to use the '05 trans with the '05 harness, because there are a some changes in the way the trans is wired and the sensors - it can get confusing to try and swap them around. Memory says any trans from 03-07 should work, but the earlier ones are different, as are the later ones.

On my '50 project, I'm using a 2011 ECM and TCM and harness with a 2010 trans, which works out fortunately.

If you're feeling brave, check out this page: http://lt1swap.com/2000harness.htm ... TONS of info about the differences in the harnesses for the 99-07 style trucks.